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.