TX91A-92A-Srs-Tx

Miniature Low-Cost Temperature 2-wire Transmitters

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TX91A-92A-Srs-Tx

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Data Sheet

Product Overview

Accuracy ± 0.1 %
Accuracy Note ±0.1% FS (includes effects of linearity, hysteresis and repeatability) referenced to the mV input
Calibration Trimpot/Switch
Diameter 44.5 mm
Dimensions Note 31.75 H x 44.5 mm Dia (1.25 x 1.75"); height includes terminal strip
Electrical Connection Screw Terminal
Electrical Output 4 to 20 mA
Height 31.75 mm
Hysteresis ±0.1%
Input Type Thermocouple
Linearity ±0.1%
Loop Resistance, Max (Vs-8V)/0.02A
Operating Temperature, Max 85 °C
Operating Temperature, Min -40 °C
Probe Length 0 mm
Repeatability ±0.1%
Sensor Type Transmitter
Setup Controls Trimpot/Switch
Sheath Material N/A
Storage Temperature, Max 121 °C
Storage Temperature, Min -46 °C
Supply Power Note 8 to 50 Vdc; 24 Vdc recommended
Supply Power Type DC
Supply Voltage 8 to 50 Vdc
Thermocouple Type K
Weight 34 g
Zero Setting Adjustable Range ±10%

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)