Series TDFS Thermal Dispersion Flow Switch

Thermal Dispersion Flow Switch
Non-Mechanical, Low Pressure Drop

$0.00

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Series TDFS Thermal Dispersion Flow Switch

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Description

Non-Mechanical, Low Pressure Drop

The SERIES TDFS Thermal Flow Switch uses impulse thermal dispersion measurement technique to indicate whether the flow rate is above or below a user set flow rate. It provides NO and NC NPN outputs and two LED, one green and one red for high and low set point indication.

Product Applications

Boiler flow proving
Hot water heaters
Chillers
Liquid transfer systems

More Information

Model Chart

EXAMPLE	TDFS	1	P	10	Series TDFS-1-P-10 Thermal Dispersion Flow Switch, 316SS and polysulfone body, PVC jacketed cable, 10' length.
SERIES	TDFS				Thermal Dispersion Flow Switch
CONSTRUCTION		1 2			316SS and Polysulfone Body Glass Seal
CABLE TYPE			P B		PVC Jacketed Cable Burial Rated Cable
CABLE LENGTH				03 06 10 15 20 25 30 35 40 45 50	3 Ft. Cable 6 Ft. Cable 10 Ft. Cable 15 Ft. Cable 20 Ft. Cable 25 Ft. Cable 30 Ft. Cable 35 Ft. Cable 40 Ft. Cable 45 Ft. Cable 50 Ft. Cable

Specifications

Service: Compatible water-based fluids.
Wetted Materials: 316 SS, Polysulfone, and FKM.
Setpoint Range: 0.5 to 10 ft/s (0.15 to 3.0 m/s).
Repeatability: 0.07 ft/s +3% of setpoint.
Typical Deadband: 0.1 ft/s +15% of setpoint.
Temperature Limits: >Process: 5 to 185°F (-15 to 85°C) (non-freezing);: Ambient: 5 to 167°F (-15 to 75°C),
Storage: -40 to 185°F (-40 to 85°C).
Pressure Limits: 300 psig (20.67 bar), max. momentary surge: 500 psig (34.47 bar).
Response Time: Approximately 8 s.
Power Requirement: 9 to 24 VDC.
Switching Current: 400 mA, derate 5 mA/°C above 23°C.
Current Consumption: Average: 93 mA, Peak: 300 mA.
Electrical Connection: 4 conductor 22 AWG, 6' (1.83 m) long with cable gland.
Process Connection: 1/2" NPT male.
Enclosure Rating: NEMA 4X (IP65).
Housing Materials: 316 SS, 416 SS, polycarbonate, neoprene, and acrylated urethane.
Switch Type: 1 NO NPN, 1 NC NPN.
Input Power and Protection: 0.5A fuse (resettable) reverse polarity protected.
Switched Output Protection: 0.5A fuse (resettable) reverse polarity protected.
Agency Approvals: CE.

Features

Better long term reliability and life expectancy than mechanical flow switches with no paddles or vanes to wear or break, no jams in the paddle movement, and no seals on movement assembly to wear or leak
Not affected by empty pipe detection and avoids overheating by actively heating above the process temperature and then cooling down to process temperature
Set point is easily field set by taping the included magnet on the set point target three times at the desired flow rate
LED status indicators provide visual switch indication of set point
Low pressure drop, only needs to be 10% into the flow (e.g. 1/8" for 3/4" schedule 40 pipe)

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