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Universal Temperature Connector Transmitter for TC and RTDs

Universal Temperature Connector-Transmitter, for RTD’s and Thermocouples


Item# SPRTX-M1

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Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $200.70
10-49 $190.67
50-99 $180.63
100-999 $170.60
1000-4999 $160.56
5000+ $150.53

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Lead Time ( If not in Stock): 13 weeks

Universal Temperature Connector-Transmitter, for RTD’s and Thermocouples SPRTX-M1 SPRTX-M1
  • High Accuracy, Repeatability and Stability
  • Connector Design Converts Input Signal to a Standard 2-Wire, 4 to 20 mA Output
  • Provides “Open Sensor Wire” Signal Indication
  • Easy Interface, Just plug into the Connector-Transmitter™
  • Encapsulated Housing
  • Compensates for Long Lead Wires
  • Factory Calibrated, No Adjustments Required
  • Models for 100 ohm, 0.00385 3-Wire RTD’s and J,K,T Thermocouples (Ungrounded)

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Product Specs

The OMEGATM SPRTX and STCTX Series are high performance, low cost, industrial RTD (Resistive Temperature Device) and Thermocouple Connector-Transmitters. Both feature a encapsulated micro miniature signal conditioner built into a patented connector housing. The SPRTX signal conditioner converts the resistive change of a 100 Ω, 0.00385 RTD sensor or probe across a dedicated temperature range into an industry standard 2-wire, 4 to 20 mA analog output. The STCTX signal conditioner converts the non-linear millivolt output of a thermocouple sensor or ungrounded probe across a dedicated temperature range into an industry standard 2-wire, 4 to 20 mA analog output. This analog output can be sent hundreds of feet away from the location of your sensor (probe) to an indicating device, controller, PLC, computer, data logger or chart recorder.

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Supply Voltage: 9 to 24 Vdc @ 30 mA max
Output: Linearized 4 to 20 mA
Accuracy: ±0.5% of FS @ 23°C (73°F) ambient
Repeatability: ±0.25°C (±0.5°F)
Temperature Effect: ±0.0022 mA/ °C (±0.0012 mA/°F)
Max Load: Rmax (Ω) = (Vsupply - 9 V)/0.02 A
Max Input Lead Resistance: 50 V
Transmitter Operating Temp: -40 to 85°C (-40 to 185°F)
Output Connection: 2-wire, shielded cable [3 m (10') included]
Approvals: CE marked
Weight: 110 g (0.25 lb) max with cable

SPRTX Series for RTDs
SPRTX-M1, SPRTX-S1: -99 to 208°C (-146 to 406°F)
SPRTX-M2, SPRTX-S2: 2 to 569°C (36 to 1056°F)
Input: 3-wire, Pt100 (α = 0.00385)
Open Sensor Wire Indication:
Leg 1: Open = 27 mA
Leg 2: Open = 2.2 mA
Leg 3: Open = 2.2 mA
Input Connection:
SPRTX-M1, SPRTX-M2: 3-prong miniature connector (MTP-U-F)
SPRTX-S1, SPRTX-S2: 3-prong standard-size connector (OTP-U-F)
SPRTX-M1, SPRTX-M2: 24 H x 18 W x 79 mm L (0.96 x 0.70 x 3.12")
SPRTX-S1, SPRTX-S2: 36 H x 18 W x 83 mm L (1.43 x 0.70 x 3.25")

STCTX Series for Thermocouples
Range by Model:
STCTX-J1, -K1, -T1: -18 to 121°C (0 to 250°F)
STCTX-J2, -K2: -18 to 538°C (0 to 1000°F)
STCTX-K3: -18 to 1093°C (0 to 2000°F)
STCTX-T2: -18 to 399°C (0 to 750°F)
Input: Thermocouple signal (ungrounded sensors only); Type J, K or T by model
Open Sensor Indication: 22 to 27 mA
Input Connection: Universal thermocouple connector (UST Series)
Supply Voltage: 9 to 24 Vdc @ 30 mA
Output: 4 to 20 mA (2-wire)
Accuracy: ±0.5% of full scale millivolt input @ 23°C (73°F) plus the non-linearity of the thermocouple type (Note: The STCTX does not compensate for thermocouple non-linearity)
Ambient Temp Effect: ±0.015 mA/°C
Max Loop Load: V = (Vsupply - 9 V)/0.020 A
Transmitter Operating Temp: -40 to 85°C (-40 to 185°F)
Output Connection: 2-wire shielded cable [3 m (10') included]
Response Time: 120 ms (0 to 63% FS)

Rated 2 out of 5 by from Convenient to quick disconnect from the RTD We have been using these on our equipment for several years. We would rather have something better but at the moment this is what has to do. Be careful of where the wire enters the transmitter. This gets kinked at all and the readings will be wrong. I have had loose terminals inside both the transmitter and RTD. Keep the connections clean and free from corrosion. That too, conductivity, will affect the temperature readings.
Date published: 2016-09-20
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