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.
† Price are shown in RMB.
Note: Range Code "T6" is not available
Part Number Builder
Option Descriptions
(1)
Transmitter Type
Select TX91A for Thermocouple transmitter only TX92A for RTD transmitter only NB1TXA for Thermocouple transmitter with Cast-Iron head and 12 inch probe NBSTXA for Thermocouple transmitter with Aluminum head and 12 inch probe PRTXA for RTD transmitter with Cast-Iron head and 12 inch RTD probe
(2)
Input Type
Select Nothing(leave field blank) for RTD transmitter J for Type J thermocouple (Iron-Constantan) K for Type K thermocouple (Chromega™-Alomega™) T for Type T thermocouple (Copper-Constantan) (ranges 6 and 11 excluded) E for Type E thermocouple (Chromega™-Constantan)
(3)
Range for transmitter
Select Nothing(leave field blank) for RTD probe assemblies 1 for -40 to 140°F (RTD only) 2 for 0 to 200°F 3 for 0 to 300°F 4 for 0 to 500°F 5 for 0 to 750°F 6 for 0 to 1000°F (Thermocouple J K E and RTD only) 7 for 0 to 100°C 8 for 0 to 150°C 9 for 0 to 250°C 10 for 0 to 400°C 11 for 0 to 500°C (Thermocouple J K E only)
(4)
Range for RTD probe assemblies only
Select Nothing(leave field blank) for single transmitter units 1-12 for -40 to 140°F (RTD) 2-12 for 0 to 200°F (RTD) 3-12 for 0 to 300°F (RTD) 4-12 for 0 to 500°F (RTD) 5-12 for 0 to 750°F (RTD) 6-12 for 0 to 1000°F (RTD) 7-12 for 0 to 100°C (RTD) 8-12 for 0 to 150°C (RTD) 9-12 for 0 to 250°C (RTD) 10-12 for 0 to 400°C (RTD)
(5)
Linearized RTD
Select Nothing(leave field blank) for standard non-linearized transmitter -L for for the 4-20mA output linearized to temperature and selected range
(6)
Factory Scale
Select Nothing(leave field blank) for None -FS for Factory Scaling. Please specify scaling data in comments section during checkout.
NOTE: All combinations may not be valid, check spec sheet for valid part numbers.
