The Techne model WSP425 and SSP670 PRTs are an excellent choice for use as reference sensors in all types of systems, including dry block calibrators, liquid calibration baths, ovens, reactors and other applications where temperature needs to be accurately measured.
Our PRTs offer proven and reliable performance for critical temperature measurements. They can be used with our Tecal Accu-Temp indicator or any comparable unit. Both models include a carrying case and ITS-90 calibration (NIST traceable) certificate with coefficients and resistance vs. temperature table. The SSP670 has excellent performance, specifications, and wide temperature range at an affordable price, while the WSP425 is designed for measurements within a narrower temperature range.
670°C Secondary Standard PRT
Model SSP670 PRTs are assembled using our special wire wound RTD elements and assembled into inconel sheaths. The SSP670 PRT has the accuracy and long-term stability specifications you would find in much higher priced secondary standard PRTs.
The SSP670 PRT can be used as a secondary standard in calibration baths, furnaces, fluidized baths, dry block calibrators and other any other temperature calibration work requiring a high level of accuracy and repeatability.
Each SSP670 includes an ITS-90 NIST traceable calibration with a+, b+, c+, a- and b- coefficients and R vs T table. A carrying case is also included.
|Resistance at 0°C||100 ohms|
|Temperature range||-200 to 670°C|
|Calibrated temperature range||-196 to 670°C|
|Temperature coeffi cient||0.003925 Ω /Ω /°C minimum|
|Stability||R0 typical drift < 0.01°C after 500 hours at 670°C|
|Thermal shock||R0 typical drift < 0.005°C after 100 times|
from 25 to 670°C
|Dimensions||0.25″ dia. x 18″ L inconel sheath as standard, custom sizes available|
|Tolerance at 0°C||±0.06%, IEC DIN class A|
|Lead wires||4 wire Tefl on insulated, stranded 22 AGW copper x 6 long|
|Calibrated uncertainty (K=2)|
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