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.
SPECIFICATIONS 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 Range: 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) Dimensions: 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)
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Convenient to quick disconnect from the RTDWe 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.