{"title":"Switches","description":"\u003cp\u003eOur Switches act as reliable control points in critical systems. Designed to activate alarms or initiate safety responses when preset thresholds are reached, they keep operations running smoothly while protecting equipment and personnel. From pressure switches to temperature and flow options, these devices offer quick response times and dependable accuracy. Whether you’re managing industrial automation or safety compliance, our range of precision switches ensures efficiency, reliability, and peace of mind in demanding environments.\u003c\/p\u003e","products":[{"product_id":"series-1800-low-differential-pressure-switch-for-general-industrial-service","title":"Series 1800 Low Differential Pressure Switch for General Industrial Service","description":"\u003cp\u003eThe Series 1800 Low Differential Pressure Switch is engineered for general industrial service, offering set points from 0.07\" to 85\" w.c. It provides repetitive accuracy within 2%, ensuring reliable performance in monitoring low differential pressures. This switch is suitable for applications such as filter monitoring, airflow detection, and HVAC systems.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\n\u003cp\u003eSet points from 0.07\" to 85\" w.c.\u003c\/p\u003e\n\n\u003cp\u003eRepetitive accuracy within 2%\u003c\/p\u003e\n\n\u003cp\u003eSuitable for filter monitoring and airflow detection\u003c\/p\u003e\n\n\u003cp\u003eDurable construction for industrial environments\u003c\/p\u003e\n\n\u003cp\u003eIdeal for HVAC and process control applications\u003c\/p\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49816827101479,"sku":"Series1800","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49816827134247,"sku":"Series1800","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1800_combined_large_55315de5-5a46-4673-bbd7-0c5fd8f5ad19.gif?v=1741301851"},{"product_id":"series-1900-compact-low-differential-pressure-switches","title":"Series 1900 Compact Low Differential Pressure Switches","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eSet Points from 0.07\" to 20\" w.c., Repetitive Accuracy within 3%\u003c\/p\u003e\r\n\u003cp\u003eOur most popular \u003cb\u003eSERIES 1900\u003c\/b\u003e combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. For air and non-combustible compatible gases, Series 1900 switches have set points from 0.07 to 20\" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering. UL, CE and CSA listed, and FM approved.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eCAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003ePlease see SERIES AT11910 for ATEX approved.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eAir conditioning refrigeration coil icing detection; defrost cycle intiation.\u003c\/li\u003e\r\n\u003cli\u003eClogged filter detection.\u003c\/li\u003e\r\n\u003cli\u003eVariable air volume controller.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49816832311591,"sku":"Series1900","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49816832344359,"sku":"Series1900","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1910-1_new_large_59d408f9-9faa-497d-aa81-105273f3aa63.gif?v=1741302155"},{"product_id":"series-1950-explosion-proof-differential-pressure-switch","title":"Series 1950 Explosion-proof Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eCompact, Low Cost, Explosion-proof and Weatherproof\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eSERIES 1950\u003c\/b\u003e Explosion-Proof Differential Pressure Switch combines the best features of the popular Dwyer® Series 1900 Pressure Switch with an integral explosion-proof and weatherproof housing, making it an exceptional value for either application. It is CE, UL and CSA listed, FM approved for use in Class I, Div 1, Groups C and D, Class II Groups E, F, and G and Class III hazardous atmospheres (NEMA 7 \u0026amp; 9), Raintight NEMA 3 (IP54). Weatherproof features include a drain plug and O-ring seal in cover. Electrical connections are easily made by removing front cover. For convenience the set point adjustment screw is located on the outside of the housing. Twelve models offer set points from .03 to 20 in w.c. (0.0075 to 5 kPa) and from .5 to 50 psi (0.035 to 3.5 bar). The unit is very light and compact — about half the weight and bulk of other explosion-proof or weather-proof switches with separate enclosures.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eCAUTION:\u003c\/b\u003e For use only with air or compatible gases. Applications with hazardous atmospheres and a single positive pressure may require special venting.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eHVAC applications\u003c\/li\u003e\r\n\u003cli\u003eProcess applications\u003c\/li\u003e\r\n\u003cli\u003eAll-weather applications\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49816992973095,"sku":"Series1950","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49816993005863,"sku":"Series1950","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1950_large_e5d145dc-f64d-4001-9a8d-5653e8022664.gif?v=1741304059"},{"product_id":"series-h3-explosion-proof-differential-pressure-switch","title":"Series H3 Explosion-Proof Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eSetpoints from 10\" w.c. to 200 psid – Rated 1500 psig, Weatherproof\u003c\/p\u003e\r\n\u003cp\u003eExplosion-proof \u003cb\u003eSERIES H3\u003c\/b\u003e, heavy duty, industrial unit has a unique new design which provides sensitivity to differential pressures as low as 10 inches of water (254 mm w.c.), yet handles total pressure of 1500 psi (103 bar). Unlike common differential pressure switches that use a piston-type motion transfer, the Series H3 utilizes a rotary motion transfer shaft that prevents a change in total pressure from causing a setpoint shift. Unit yields deadbands approximately 5% of range, with zero setpoint shift due to variation in working pressures. Friction is minimized and repeatability increased by allowing range spring to act directly on diaphragm plate. Rolling diaphragm design maintains constant effective area to further reduce friction. Diaphragm is allowed to “seat”, allowing application of full rated pressure, up to 1500 psi (103 bar), on either high or low pressure port, without damage. Special over-travel feature prevents overtightening of range adjust screw. Choose optional 316SS chamber for water and water-based fluids or harsher applications.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eWater flow proving with an orifice plate.\u003c\/li\u003e\r\n\u003cli\u003eDifferential pressure across chiller.\u003c\/li\u003e\r\n\u003cli\u003eLiquid filter status.\u003c\/li\u003e\r\n\u003cli\u003ePerfect for monitoring differential water pressure on filters, chiller coils, and flow elements.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817011978535,"sku":"SeriesH3","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817012011303,"sku":"SeriesH3","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/h3.jpg?v=1741304234"},{"product_id":"series-1950g-explosion-proof-differential-pressure-switch","title":"Series 1950G Explosion-proof Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eExplosion-proof, Weatherproof, Compatible with Natural Gases\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eSERIES 1950G\u003c\/b\u003e Explosion-Proof Switch combines the best features of the popular Dwyer® Series 1950 Pressure Switch with the benefit of natural gas compatibility. Units are rain-tight for outdoor installations, and are UL listed for use in Class I, Groups A, B, C, \u0026amp; D; Class II, Groups E, F, \u0026amp; G and Class III atmospheres, Directive 2014\/34\/EU (ATEX) Compliant for CE ATEX II 2G Exd IIB+H\u003cspan\u003e2 \u003c\/span\u003eT6, CSA \u0026amp; FM approved for Class I, Div. 1, Groups B, C, D; Class II, Div. 1, Groups E, F, G and Class III atmospheres IECEx Ex d IIB+H\u003cspan\u003e2 \u003c\/span\u003eT6 (-40°C \u0026lt; Ta \u0026lt; +60°C). The 1950G is very compact, about half the weight and bulk of equivalent conventional explosion-proof switches.\u003c\/p\u003e\r\n\u003cp\u003eEasy access to the SPDT relay and power supply terminals is provided by removing the top plate of the aluminum housing. A supply voltage of 24 VDC, 120 or 240 VAC is required. A captive screw allows the cover to swing aside while remaining attached to the unit. Adjustment to the set point of the switch can be made without disassembly of the housing.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eNatural gas applications\u003c\/li\u003e\r\n\u003cli\u003eProcess applications\u003c\/li\u003e\r\n\u003cli\u003eAll-weather applications\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817014075687,"sku":"Series1950G","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817014108455,"sku":"Series1950G","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1950g_large1.gif?v=1741304312"},{"product_id":"series-1620-single-and-dual-pressure-switch","title":"Series 1620 Single and Dual Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eHigh Reliability, Repetitive Accuracy within ±1%\u003c\/p\u003e\r\n\u003cp\u003eOn the \u003cb\u003eSERIES 1620\u003c\/b\u003e our old faithful switch design is still best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Model 1626 and 1627 differential pressure switches are identical in design and construction except that Model 1626 has a single electric switch and Model 1627 has dual electric switches. Model 1627 can therefore provide dual control when required. It can be set to open or close two independent electrical circuits, each preset for its own actuation pressure. Both units have diaphragm sealed motion take outs providing maximum protection against leakage.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eCAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eDamper positioning\u003c\/li\u003e\r\n\u003cli\u003eDuct air control\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817017155879,"sku":"Series1620","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817017188647,"sku":"Series1620","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1620_pic.jpg?v=1741304526"},{"product_id":"series-1630-large-diaphragm-pressure-switches","title":"Series 1630 Large Diaphragm Pressure Switches","description":"\u003cp\u003eSeries 1630 Large Diaphragm Pressure Switches are engineered for monitoring and controlling pressure in industrial systems. Featuring a large diaphragm design, they provide high sensitivity and accurate switching even under low-pressure conditions. These switches are ideal for water systems, pumps, compressors, and HVAC equipment, ensuring reliable operation and protection against overpressure. The durable construction allows long-term use in demanding environments, and the adjustable set points provide flexibility for various applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\n\u003cp\u003eLarge diaphragm for high sensitivity and precise switching\u003c\/p\u003e\n\n\u003cp\u003eAdjustable set points for customizable operation\u003c\/p\u003e\n\n\u003cp\u003eSuitable for water systems, pumps, compressors, and HVAC\u003c\/p\u003e\n\n\u003cp\u003eDurable design for long-term industrial use\u003c\/p\u003e\n\n\u003cp\u003eEnsures system protection against overpressure\u003c\/p\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817020956967,"sku":"Series1630","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817020989735,"sku":"Series1630","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1630_pic.jpg?v=1741304754"},{"product_id":"series-1640-floating-contact-null-switch-for-high-and-low-actuation","title":"Series 1640 Floating Contact Null Switch for High and Low Actuation","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eVisual Set Point Adjustment, Adjustable Null Zone\u003c\/p\u003e\r\n\u003cp\u003eThe unique electric switch design in the \u003cb\u003eSERIES 1640\u003c\/b\u003e is another Dwyer Instrument, Inc. innovation. The Dwyer® Series 1640 Differential Pressure Switch resembles the Series 1630 switches. However, the Series 1640 is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch.\u003c\/p\u003e\r\n\u003cp\u003eAs the diaphragm moves in response to pressure changes, it moves the floating contact to cause switching action at two preset points with no switching action between these points. The \"high\" circuit will be closed when rising pressure differential reaches the preset level. The \"low\" circuit will be closed when falling pressure differential reaches the preset level.\u003c\/p\u003e\r\n\u003cp\u003eA typical example of usage is to position motorized dampers when static pressure in a duct system reaches a desired maximum and reposition the dampers when the static pressure falls to a pre-established minimum. By using a Pitot tube sensing element the Series 1640 switch can serve in the same way to control air velocity and maintain a constant volume of air in a supply duct.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eCAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eDamper positioning\u003c\/li\u003e\r\n\u003cli\u003eDuct air control\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817023316263,"sku":"Series1640","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817023349031,"sku":"Series1640","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1640_pic.jpg?v=1741304825"},{"product_id":"series-dp-double-bellows-differential-pressure-switch","title":"Series DP Double Bellows Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eVisible Setpoints, Adjustable or Fixed Deadband . . . High Pressure Ranges\u003c\/p\u003e\r\n\u003cp\u003eTwo opposing bellows combine maximum sensitivity and vibration resistance at a moderate cost in the \u003cb\u003eSERIES DP\u003c\/b\u003e differential pressure switches. Both set and reset points are easily adjustable through non-interactive, externally accessible controls. Visible setpoint indicators simplify changes. SPDT snap action switch, 316 stainless steel or brass bellows, flanged steel housing. Rated pressures to 600 psig.\u003c\/p\u003e\r\n\u003cp\u003eA wide variety of switches and circuit styles enables exactly the specific type of control function needed for any system. Mercury switches are a good choice for humid areas while snap switches are better able to resist vibration. Various operations possible include single adjustment - fixed deadband, double adjustment - adjustable deadband, manual reset (increasing or decreasing pressure) and two stage with each SPST or SPDT switch independently adjustable. Standard enclosure is NEMA-1 style. Optional weatherproof construction is for outdoor use and explosion-proof enclosure meets requirements for Class I, Groups C \u0026amp; D; Class II, Groups E, F \u0026amp; G.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eAccurate switch triggers in high pressure applications\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817024594215,"sku":"SeriesDP","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817024626983,"sku":"SeriesDP","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/dp_pic.jpg?v=1741304921"},{"product_id":"series-pg-gas-pressure-differential-pressure-switch","title":"Series PG Gas Pressure\/Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eExternal Adjustment, Visible Dial, Hermetically Sealed Snap or Mercury Switch\u003c\/p\u003e\r\n\u003cp\u003eLarge sensitive diaphragm and reliable, time proven mechanical design are combined in \u003cb\u003eSERIES PG\u003c\/b\u003e pressure\/differential pressure switches. For use with air and other compatible gases, they feature excellent ±1% of full scale repeatability, clear easy-to-read scale and convenient external setpoint adjustment.\u003c\/p\u003e\r\n\u003cp\u003eApplication flexibility is assured by a large variety of switching options including SPST, SPDT, DPST and DPDT; opening or closing on increasing pressure, vacuum or differential. PR and PRL models add manual reset operation on increasing or decreasing pressure. Mercury switches or hermetically sealed snap switches are available where high humidity would be a problem. If vibration or other factors preclude the use of mercury, snap switches can be provided. Standard housing is NEMA 1. Optional enclosures can be supplied for weather resistant and explosion-proof requirements.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eNatural, manufactured or LP gas applications\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817025085735,"sku":"SeriesPG","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817025118503,"sku":"SeriesPG","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/pg_pic.jpg?v=1741304971"},{"product_id":"series-1996-gas-pressure-switch","title":"Series 1996 Gas Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eCompact, Low Cost, Range 4 to 20\" w.c.\u003c\/p\u003e\r\n\u003cp\u003eReliable and convenient, the \u003cb\u003eSERIES 1996\u003c\/b\u003e Gas Pressure Switches serve as a compact, low cost switch for gas fired furnaces and equipment. Pressure ranges for both models are ideal for high or low gas pressure interlock. Visible set point and on-off indicators add convenience in servicing. Use either NO or NC contacts on SPDT switch. Bottom connection has both 1\/8\" female and 1\/4\" male threads for pipe nipple or coupling. Top connection vents diaphragm chamber to outside or to furnace combustion chamber. Mount switch with diaphragm in a horizontal position and gas pressure connection at bottom. Used with natural, manufactured or LP gas.\u003c\/p\u003e\r\n\u003cp\u003eFor explosion-proof alternatives see \u003cb\u003eSeries 1950\u003c\/b\u003e or \u003cb\u003eSeries 1950G\u003c\/b\u003e .\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eGas furnaces\u003c\/li\u003e\r\n\u003cli\u003eNatural, manufactured or LP gas applications\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817026593063,"sku":"Series1996","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817026625831,"sku":"Series1996","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1996_pic.jpg?v=1741305092"},{"product_id":"series-mds-miniature-pressure-switch","title":"Series MDS Miniature Pressure Switch","description":"\u003cp\u003eThe Series MDS Miniature Pressure Switch is a compact and reliable device designed for precise pressure monitoring in confined spaces. Its lightweight construction and dual diaphragm mechanism ensure long-term durability and consistent performance. Ideal for applications requiring low-pressure detection, this switch offers a cost-effective solution without compromising on quality.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\n\u003cp\u003eDual diaphragm design for enhanced sensitivity\u003c\/p\u003e\n\n\u003cp\u003eCompact and lightweight for space-constrained installations\u003c\/p\u003e\n\n\u003cp\u003eAdjustable set point for versatile applications\u003c\/p\u003e\n\n\u003cp\u003eLong operational life with minimal maintenance\u003c\/p\u003e\n\n\u003cp\u003eSuitable for low-pressure monitoring in various systems\u003c\/p\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817029869863,"sku":"SeriesMDS","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817029902631,"sku":"SeriesMDS","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/mds_pic.jpg?v=1741305190"},{"product_id":"series-mda-miniature-adjustable-pressure-switch","title":"Series MDA Miniature Adjustable Pressure Switch","description":"\u003cp\u003eThe Series MDA Miniature Adjustable Pressure Switch is a compact and versatile device designed for precise pressure monitoring and control in confined spaces. Its adjustable setpoint allows for customizable activation, making it suitable for a wide range of applications, including HVAC systems, automotive diagnostics, and laboratory equipment. The switch features a durable construction, ensuring reliable performance even in challenging environments.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\n\u003cp\u003eAdjustable setpoint for customizable pressure activation\u003c\/p\u003e\n\n\u003cp\u003eCompact design ideal for confined spaces\u003c\/p\u003e\n\n\u003cp\u003eDurable construction for reliable performance\u003c\/p\u003e\n\n\u003cp\u003eSuitable for HVAC systems, automotive diagnostics, and laboratory equipment\u003c\/p\u003e\n\n\u003cp\u003eEasy installation and maintenance\u003c\/p\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817044189479,"sku":"SeriesMDA","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817044222247,"sku":"SeriesMDA","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/mda_pic.jpg?v=1741305264"},{"product_id":"series-a4-differential-pressure-switch","title":"Series A4 Differential Pressure Switch","description":"\u003cp\u003eThe Series A4 Differential Pressure Switch is built for rugged industrial environments where reliable pressure monitoring is essential. Utilizing a piston-based mechanism, it withstands system pressures up to 6000 psig and operates accurately across a wide range with ±2 psi repeatability. Its field-adjustable design and SPDT switch configuration make it highly versatile. Rated for moderate shock and vibration, this switch can be mounted in any orientation. With a robust aluminum body and flexible electrical connection via pigtail leads, it’s a dependable choice for critical fluid measurement, HVAC, and manufacturing control systems.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\n\u003cp\u003eHandles system pressures up to 6000 psig\u003c\/p\u003e\n\n\u003cp\u003ePiston design supports any mounting orientation\u003c\/p\u003e\n\n\u003cp\u003eField-adjustable set points for flexibility\u003c\/p\u003e\n\n\u003cp\u003eHigh repeatability: ±2 psi\u003c\/p\u003e\n\n\u003cp\u003eSPDT switch with NO\/NC functionality\u003c\/p\u003e\n\n\u003cp\u003eResilient against shock and vibration\u003c\/p\u003e\n\n\u003cp\u003eCompact, rugged aluminum construction\u003c\/p\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817063784743,"sku":"SeriesA4","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817063817511,"sku":"SeriesA4","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/a4_pic.jpg?v=1741305333"},{"product_id":"series-pdps-compact-economic-differential-pressure-switch","title":"Series PDPS Compact Economic Differential Pressure Switch","description":"\u003cp\u003eThe Series PDPS is a compact and economical differential pressure switch designed for monitoring and controlling pressure differences in HVAC systems, filters, and other applications. Its compact size allows for easy integration into tight spaces, while its robust design ensures reliable performance. The switch features adjustable set points and a wide range of pressure settings, providing flexibility to meet various application needs.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\n\u003cp\u003eCompact size for easy integration into tight spaces\u003c\/p\u003e\n\n\u003cp\u003eAdjustable set points for flexible application\u003c\/p\u003e\n\n\u003cp\u003eWide range of pressure settings\u003c\/p\u003e\n\n\u003cp\u003eRobust design for reliable performance\u003c\/p\u003e\n\n\u003cp\u003eSuitable for HVAC systems, filters, and other applications\u003c\/p\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817080889639,"sku":"SeriesPDPS","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817080922407,"sku":"SeriesPDPS","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/pdps_pic.jpg?v=1741305429"},{"product_id":"series-1700-low-differential-pressure-switch-designed-for-oem-products","title":"Series 1700 Low Differential Pressure Switch Designed for OEM Products","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eCompetitively Priced Limit Switch Combines Fast, Simple Installation with Quality Construction and Materials, UL and CSA Recognized\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eSeries 1700 Differential Pressure Switches \u003c\/b\u003ewere specifically designed to satisfy the demands of high volume original equipment manufacturers for a tough, dependable limit switch at a very low price. The Model 1710 uses Dwyer's simple, time-proven method of mechanically coupling a sensitive 3\" diameter silicone rubber diaphragm to a versatile SPDT snap switch. The switch housing is precision molded of a high strength glass filled PPO which has excellent dimensional and thermal stability. This unique combination of existing and new technologies enables Dwyer to offer a limit switch priced less than comparable units without sacrificing performance. Installation is fast and simple with twist and tighten mounting screw slots, 1\/4\" quick connect electrical terminals and dual size barbed pressure ports for 1\/8\" and 3\/16\" ID vinyl or rubber tubing.\u003c\/p\u003e\r\n\u003cp\u003eFor use with air and other non-combustible, non-corrosive gases, switches are UL and CSA recognized. Two models are offered with field adjustable ranges from .15 to .55\" w.c. and .50 to 7.5\" w.c. Units are rated for 2 psig maximum system pressure, temperature limit is 190°F and weight is only 4 oz.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eHigh efficiency furnaces\u003c\/li\u003e\r\n\u003cli\u003eDuct pressure monitor\u003c\/li\u003e\r\n\u003cli\u003eLaboratory fume hoods\u003c\/li\u003e\r\n\u003cli\u003eMonitor air filter condition\u003c\/li\u003e\r\n\u003cli\u003eEngine diagnostic equipment\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817081544999,"sku":"Series1700","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817081577767,"sku":"Series1700","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1700_pic.jpg?v=1741305476"},{"product_id":"series-adps-edps-differential-pressure-switch","title":"Series ADPS\/EDPS Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eWith Dual Scale Field Adjustable Set Point Knob\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eThe Series ADPS\/EDPS Adjustable Differential Pressure Switch\u003c\/b\u003e is designed for pressure, vacuum, and differential pressures. The dual scaled adjustment knob in inches water column and pascals allows changes to the switching pressure to be made without a pressure gage. The ADPS\/EDPS is available with settings from 0.08 in w.c. (20 Pa) up to 20 in w.c. (5000 Pa). The silicone diaphragm and PA 6.6 body make the series ADPS ideal for use with air and other noncombustible gases. Series EDPS models meet UL508 and are constructed of plenum rated plastics. The compact size, adjustment knob and low cost make the ADPS\/EDPS the perfect choice for HVAC applications.\u003c\/p\u003e\r\n\u003cp\u003ePlease see SERIES AT1ADPS for ATEX approved.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eMonitoring air filters and ventilators.\u003c\/li\u003e\r\n\u003cli\u003eMonitoring industrial cooling-air circuits.\u003c\/li\u003e\r\n\u003cli\u003eOverheating protection for fan heaters.\u003c\/li\u003e\r\n\u003cli\u003eMonitoring flows in ventilation ducts.\u003c\/li\u003e\r\n\u003cli\u003eControlling air and fire-protection dampers.\u003c\/li\u003e\r\n\u003cli\u003eFrost protection for heat exchanges.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817083183399,"sku":"SeriesADPS\/EDPS","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817083216167,"sku":"SeriesADPS\/EDPS","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/adps_edps_large_29e20b46-f36b-4f29-8769-561d00c75f22.gif?v=1741305610"},{"product_id":"series-byds-bypass-damper-switch","title":"Series BYDS Bypass Damper Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eControls Zone Static by Modulating Motorized Damper\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eThe Series BYDS Bypass Damper Switch\u003c\/b\u003e is designed to control motorized bypass dampers. As individual zone dampers open and close, the system static pressure will rise and fall. In order to maintain proper airflow and static pressure through the HVAC system, a bypass system incorporating a floating type motorized damper and a static pressure control should be incorporated. A typical on\/off pressure switch cannot operate in this application due to the high cycle rate that would result, eventually causing contact burnout. The BYDS static pressure control is equipped with a solid-state switching and timing circuit to enhance operation and improve long-term reliability in this demanding application.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eCONTROL OPERATION\u003c\/b\u003e\u003cbr\u003e The BYDS Bypass Damper Switch is designed for use with a three wire floating point damper actuator used to control the static pressure on zone control systems requiring motorized bypass dampers. A bypass damper, bypasses air from the discharge air side of the HVAC unit back in the return air side. The air flow is modulated in order to maintain a constant static pressure in the system as individual zone dampers open and close. The static pressure control is equipped with solid-state switching which dramatically increases the life of the control. On an increase in static pressure the BYDS will send 24 volts out and start the actuator to drive open. When the static pressure reaches set-point the actuator will stop. After a ten second delay the actuator will start to drive the damper closed if there has not been an increase in static pressure. A green LED indicates when the damper is in the open position or being driven open. A 24 VAC transformer is required to power the BYDS control and damper actuator. The unit includes tubing and two static pressure probes.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eAir filter and ventilator monitoring\u003c\/li\u003e\r\n\u003cli\u003eIndustrial cooling circuits\u003c\/li\u003e\r\n\u003cli\u003eFire-protection damper control\u003c\/li\u003e\r\n\u003cli\u003eVentilation duct monitoring\u003c\/li\u003e\r\n\u003cli\u003eFan heater overheating protection\u003c\/li\u003e\r\n\u003cli\u003eHeat exchanger frost protection\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817086820647,"sku":"SeriesBYDS","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817086853415,"sku":"SeriesBYDS","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/byds_pic.jpg?v=1741305735"},{"product_id":"series-1831-dpdt-low-differential-pressure-switches","title":"Series 1831 DPDT Low Differential Pressure Switches","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eManual Reset, No Power Required\u003c\/p\u003e\r\n\u003cp\u003eOne of our most popular differential pressure switches is now available with a DPDT switch and manual reset. The \u003cb\u003eSERIES 1831\u003c\/b\u003e combines small size with 4% set point repeatability. Absolutely no power is required to operate the DPDT switch. Set point adjustment on the switch is easily accessible for modifying the set point.\u003c\/p\u003e\r\n\u003cp\u003eThe Series 1831 DPDT Low Differential Pressure Switches with Manual Reset eliminate common problems associated with typical high duct static cutout installations. Since the 1831 requires absolutely no power to drive its outputs, a separate power loop and its associated additional wiring and conduit is alleviated, reducing material and labor installation costs. Both control contacts of the Series 1831 activate at the same time. The potential of the lead switch shutting down the fan preventing the lag switch from sending an alarming signal to the DDC is no longer a probable system liability. Potential costly maintenance calls are diminished. Unlike typical switches that posses only a single conduit entry for both control loops, the Series 1831 provides two conduit connections simplifying wiring while eliminating additional conduit tees. The Series 1831's specifications and features make it the superior choice for high duct static cutout applications.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eHigh duct static cutout applications\u003c\/li\u003e\r\n\u003cli\u003eHVAC\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817088557351,"sku":"Series1831","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817088590119,"sku":"Series1831","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/1831_large_024d80db-27df-48cf-ab9d-2d61c71ea5bf.gif?v=1741305837"},{"product_id":"series-bdpa-adjustable-differential-pressure-alarm","title":"Series BDPA Adjustable Differential Pressure Alarm","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003e24 Volt or Battery Powered, Built-in Audible and Visual Alarm\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eThe Series BDPA Adjustable Differential Pressure Alarm\u003c\/b\u003e with built-in audible and visual set point indication is designed for overpressure, vacuum, and differential pressure applications. The scaled adjustment knob allows changes to the switching pressure to be made without a pressure gage. The BDPA is available with settings from 0.08\" w.c. (20 Pa) to 20\" w.c. (5000 Pa). The silicone diaphragm and PA 6.6 body make the Series BDPA perfect for use with air and other noncombustible gases.\u003c\/p\u003e\r\n\u003cp\u003eThe Series BDPA Adjustable Differential Pressure Alarms offer a versatile range of configurations allowing utilization of their many features. The BDPA can be powered by battery or 24 VDC\/VAC line power. If connecting line power, the battery can act as back-up power in case of power outage. When set point threshold is reached, a local loud audible buzzer and bright LED will indicate periodically notifying of set point activation. An SPDT contact may also be wired to send a signal remotely to a DDC or building management system. A snooze button located through an opening in the cover can be pressed by the user to manually disengage the audible and visual indication until a maintenance operation is performed. If the instrument is mounted where it is difficult to access, a remote contact may be connected allowing the user to deactivate the buzzer and LED at the remote contact location.\u003c\/p\u003e\r\n\u003cp\u003eThe Series BDPA Differential Pressure Alarm's great functional versatility makes it perfect for filter, fan, and ventilation applications or any retrofit job where installing electrical wiring proves cost-prohibitive.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eNote: For a 1\/2\" npt connection, use the 1\/2\" conduit fitting adapter (A-483).\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eAir filter and ventilator monitoring\u003c\/li\u003e\r\n\u003cli\u003eIndustrial cooling circuits\u003c\/li\u003e\r\n\u003cli\u003eFire-protection damper control\u003c\/li\u003e\r\n\u003cli\u003eVentilation duct monitoring\u003c\/li\u003e\r\n\u003cli\u003eFan heater overheating protection\u003c\/li\u003e\r\n\u003cli\u003eHeat exchanger frost protection\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817089507623,"sku":"SeriesBDPA","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817089540391,"sku":"SeriesBDPA","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/bdpa_pic.jpg?v=1741305915"},{"product_id":"series-dx-wet-wet-differential-pressure-switch","title":"Series DX Wet\/Wet Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eNEMA 4X Enclosure, Low Differential Set Points\u003c\/p\u003e\r\n\u003cp\u003eThe \u003cb\u003eSERIES DX\u003c\/b\u003e is a differential pressure switch that makes a contact output based on the differential between two pressure sources. Wetted materials of brass and flouroelastomer are suitable for use with most gases and water based solutions. The switch can be used for low differential pressure indication with set point on a decrease of pressure as low as 1 psid (0.07 bar). Differential set point ranges are available from 2.5 to 75 psid (0.17 to 5.17 bar) on increasing differential pressure and 1.0 to 67 psid (0.07 to 4.62 bar) on decreasing differential pressure. Unit features a high static pressure rating of 200 psig (13.8 bar). Weatherproof, UL type 4X, enclosure for dust laden, outdoor, or wash-down installation environments. Externally adjustable set point, integral mounting flange and a removable electrical terminal block for quick and easy installation.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eIndicating filter differential pressure. For example initiating water filter backwash as the filter becomes clogged on increasing differential pressure.\u003c\/li\u003e\r\n\u003cli\u003eProof of flow indicator monitoring differential pressure from a sensing device. For example sensing the pressure across an orifice plate to prove water flow.\u003c\/li\u003e\r\n\u003cli\u003eProving flow through a pump by sensing the pressure across the pump to make sure the pump does not run dry.\u003c\/li\u003e\r\n\u003cli\u003eProving flow through a chiller. Often called evaporator water pressure drop.\u003c\/li\u003e\r\n\u003cli\u003eProving flow through a heat pump or AC unit. Often called a condenser water lock-out switch.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817090294055,"sku":"SeriesDX","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817090326823,"sku":"SeriesDX","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/dx_pic.jpg?v=1741305991"},{"product_id":"series-at11910-atex-approved-1910-differential-pressure-switch","title":"Series AT11910 ATEX Approved 1910 Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eSeries 1910 in Flame-Proof ATEX Enclosure\u003c\/p\u003e\r\n\u003cp\u003eOur most popular Differential Pressure Switch is now available in a flame-proof ATEX approved package in the \u003cb\u003eSERIES AT11910\u003c\/b\u003e. This pressure switch combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. For air and non-combustible compatible gases, the AT11910 Series switches have set points from 0.07 to 20 in w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside the switch enclosure. Series AT11910 ATEX enclosures are available in aluminum enclosures and ideal for low pressure, hazardous area applications. \u003cbr\u003e \u003cbr\u003e \u003cb\u003eImportant notes for installation:\u003c\/b\u003e \u003cbr\u003e • Cables must be fitted through 1\/2\" NPT cable gland or ATEX conduit (not supplied with instrument). \u003cbr\u003e • Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve). \u003cbr\u003e • Open cover only after de-energizing instrument. \u003cbr\u003e \u003cb\u003e• Attention:\u003c\/b\u003e Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.\u003c\/p\u003e\r\n\u003cp\u003ePlease see SERIES 1900 for non-ATEX approved.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eHazardous area low pressure applications\u003c\/li\u003e\r\n\u003cli\u003eAir conditioning refrigeration coil icing detection; defrost cycle initiation\u003c\/li\u003e\r\n\u003cli\u003eClogged filter detection\u003c\/li\u003e\r\n\u003cli\u003eVariable air volume controller\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817091506471,"sku":"SeriesAT11910","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817091539239,"sku":"SeriesAT11910","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/at1_1900_large_28315545-07a4-46e8-b05a-5a831bd70d6c.gif?v=1741306085"},{"product_id":"series-at1adps-atex-approved-adps-adjustable-differential-pressure-switch","title":"Series AT1ADPS ATEX Approved ADPS Adjustable Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eThe ADPS in Flame-Proof ATEX Enclosure\u003c\/p\u003e\r\n\u003cp\u003eThe ATEX approved \u003cb\u003eSERIES AT1ADPS\u003c\/b\u003e Adjustable Differential Pressure Switch is designed for pressure, vacuum, and differential pressure applications in hazardous areas. The dual scaled adjustment knob in inches water column and pascals allows changes to the switching pressure to be made without a pressure gage. The switch is available with settings from 0.08 in w.c. (20 Pa) up to 16 in w.c. (4000 Pa). The silicone diaphragm makes this series ideal for use with air and other noncombustible gases. Flame-proof ATEX enclosures are available in aluminum and can include a glass window for viewing set point status on adjustment knob. \u003cbr\u003e \u003cbr\u003e \u003cb\u003eImportant notes for installation:\u003c\/b\u003e \u003cbr\u003e • Cables must be fitted through 1\/2\" NPT cable gland or ATEX conduit (not supplied with instrument). \u003cbr\u003e • Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve). \u003cbr\u003e • Open cover only after de-energizing instrument. \u003cbr\u003e \u003cb\u003e• Attention:\u003c\/b\u003e Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.\u003c\/p\u003e\r\n\u003cp\u003ePlease see SERIES ADPS for non-ATEX approved.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eHazardous area pressure switch\u003c\/li\u003e\r\n\u003cli\u003eAir filter and ventilator monitoring\u003c\/li\u003e\r\n\u003cli\u003eVentilation duct monitoring\u003c\/li\u003e\r\n\u003cli\u003eIndustrial cooling circuits\u003c\/li\u003e\r\n\u003cli\u003eFan heater overheating protection\u003c\/li\u003e\r\n\u003cli\u003eFire-protection damper control\u003c\/li\u003e\r\n\u003cli\u003eHeat exchanger frost protection\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817094783271,"sku":"SeriesAT1ADPS","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817094816039,"sku":"SeriesAT1ADPS","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/at1_adps_large_3e757b12-c6ac-4747-ab80-30bc63d791e1.gif?v=1741306184"},{"product_id":"series-at21823-atex-approved-1823-differential-pressure-switch","title":"Series AT21823 ATEX Approved 1823 Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eThe 1823 in Flame-Proof ATEX Enclosure\u003c\/p\u003e\r\n\u003cp\u003eEssential for industrial environments, the ATEX approved \u003cb\u003eSERIES AT21823\u003c\/b\u003e combines small size with 2% repeatability. Set point adjustment inside the switch allows for set point settings across 9 ranges from the low of .07 in w.c. to a maximum 85 in w.c. differential pressure. Series AT21823 flame-proof ATEX enclosures are available in aluminum and are ideal for low pressure hazardous area applications. Various housing options such as an overpressure relief valve or external setpoint adjustment knob are available. External setpoint knob allows adjustment without opening the enclosure. \u003cbr\u003e \u003cbr\u003e \u003cb\u003eImportant notes for installation:\u003c\/b\u003e \u003cbr\u003e • Cables must be fitted through 1\/2\" NPT cable gland or ATEX conduit (not supplied with instrument). \u003cbr\u003e • Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve). \u003cbr\u003e • Open cover only after de-energizing instrument. \u003cbr\u003e •\u003cspan style=\"color: #cc0000;\"\u003e\u003cb\u003e Attention:\u003c\/b\u003e\u003c\/span\u003e Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.\u003c\/p\u003e\r\n\u003cp\u003ePlease see \u003cb\u003eSeries 1800\u003c\/b\u003e for non-ATEX approved.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eHazardous area pressure switch\u003c\/li\u003e\r\n\u003cli\u003eProcess applications\u003c\/li\u003e\r\n\u003cli\u003eMechanical equipment control\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817095471399,"sku":"SeriesAT21823","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817095504167,"sku":"SeriesAT21823","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/at2-1800_large_bbf1d36f-d500-40cd-98b1-456c7584850e.gif?v=1741306255"},{"product_id":"series-ewdp-wireless-communications-adjustable-differential-pressure-switch","title":"Series EWDP Wireless Communications Adjustable Differential Pressure Switch","description":"\u003csection class=\"intro column col-3of4\"\u003e\r\n\u003cp class=\"tagline\"\u003eEnOcean® Wireless Technology\u003c\/p\u003e\r\n\u003cp\u003eThe \u003cb\u003eSERIES EWDP\u003c\/b\u003e Wireless Communication Adjustable Differential Pressure Switch uses EnOcean® wireless technology to monitor pressure, vacuum, and differential pressures. The dual scaled adjustment knob in inches of water column and pascals allows changes to the pressure set point to be made without a pressure gage. The battery-powered switch is equipped with radio module for frequencies of 902 MHz or 868 MHz which sends a signal wirelessly to a Series USB-300 receiver at each change of status. The silicone diaphragm makes this series ideal for use with air and other non-combustible gases. The EWDP is available with settings from 0.08 in w.c. (20 Pa) up to 20 in w.c. (5000 Pa). The compact size, adjustment knob, and wireless capabilities make the EWDP the perfect choice for HVAC applications in temporary installations or retrofits of existing buildings.\u003c\/p\u003e\r\n\u003cp\u003eProduct Applications\u003c\/p\u003e\r\n\u003cul class=\"list-details inline\"\u003e\r\n\u003cli\u003eMonitoring air filters and ventilators\u003c\/li\u003e\r\n\u003cli\u003eMonitoring industrial cooling air circuits\u003c\/li\u003e\r\n\u003cli\u003eOverheating protection for fan heaters\u003c\/li\u003e\r\n\u003cli\u003eMonitoring flows in ventilation ducts\u003c\/li\u003e\r\n\u003cli\u003eControlling air and fire-protection dampers\u003c\/li\u003e\r\n\u003cli\u003eFrost protection for heat exchanges\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/section\u003e","brand":"hkcalibrations","offers":[{"title":"No","offer_id":49817097044263,"sku":"SeriesEWDP","price":0.0,"currency_code":"AUD","in_stock":true},{"title":"Yes (office will call you to confirm the cost)","offer_id":49817097077031,"sku":"SeriesEWDP","price":0.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0907\/4124\/4199\/files\/ewdp_angle_large_c4136b6b-fab7-45d2-bf6c-28a40a3468f0.gif?v=1741306357"}],"url":"https:\/\/hkcalibrations.com.au\/collections\/switches.oembed?page=3","provider":"hkcalibrations","version":"1.0","type":"link"}