Miniature Low-Cost Temperature 2-wire Transmitters

The TX91A-92A series are low cost miniature transmitters with inputs for thermocouples and RTDs with 4-20mA output. Non-isolated head mount with upscale break protection.

$156.74

Calibration Options

No Calibration

Required Calibration with Product + $85.00

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Data Sheet (PDF)

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Miniature Low-Cost Temperature 2-wire Transmitters

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Description

TX91A and TX92A Series are discontinued. As an upgrade substitute, please check out the new TXUN temperature transmitter for details.

The non-isolated TX90A Series transmitters convert thermocouple or RTD signals into a 4 to 20 mA dc signal output that is directly referenced to the mV input of a thermocouple or resistance of a 100 Ohm platinum RTD.

For thermocouple transmitters, the 4 to 20mA output is not linearized. T/C transmitters are available for type K, J, T, and E with color coding for each T/C type. The transmitters for RTD’s are available with the 4 to 20mA output directly proportional to the input resistance or with the 4 to 20mA output linearized to tempearature.

Note: RTD’s are slightly non-linear with the resistance diverging from actual temperature by approximately 1% at the mid point of full scale. (For linearized RTD transmitters, specify “RTD-L”. Non-linearized transmitters are the more popular choice).

The TX90A transmitters mount directly within OMEGA’s standard protection heads for connection to your sensor. OMEGA also provides complete thermocouple and RTD assemblies.

Specifications
Output Range: 4 to 20 mA dc
Zero and Span Adjustment Range: ±25% for °F and ±10% for °C
Accuracy: ±0.1% of FS (includes effects of linearity, hysteresis and repeatability) referenced to the mV input
Operating Temperature Range: -40 to 85°C (-40 to 185°F)
Storage Temperature Range: -46 to 121°C (-50 to 250°F)
Max Loop Resistance: (Vs – 8) / 0.020A
Supply Voltage: 8-50 Vdc, 24V nominal
Dimensions: 44.5 D x 31.75 mm H (1.75 x 1.25"); height includes terminal strip

Range Codes

TX91A				TX92A		Range
J	K	T	E	RTD	RTD-L
–	–	–	–	1	1-L	-40 to 60°C (-40 to 140°F)
J2	K2	T2	E2	2	2-L	-18 to 93°C (0 to 200°F)
J3	K3	T3	E3	3	3-L	-18 to 149°C (0 to 300°F)
J4	K4	T4	E4	4	4-L	-18 to 260°C (0 to 500°F)
J5	K5	T5	E5	5	5-L	-18 to 399°C (0 to 750°F)
J6	K6	–	E6	6	6-L	-18 to 538°C (0 to 1000°F)
J7	K7	T7	E7	7	7-L	0 to 100°C (32 to 212°F)
J8	K8	T8	E8	8	8-L	0 to 150°C (32 to 302°F)
J9	K9	T9	E9	9	9-L	0 to 250°C (32 to 482°F)
J10	K10	T10	E10	10	10-L	0 to 400°C (32 to 752°F)
J11	K11	–	E11	–	–	0 to 500°C (32 to 932°F)

Factory Scaling (-FS) is available for an additional charge. Please contact our engineering team for custom scaling.