Techne PRT Probes

Our PRT's offers proven and reliable performance for your 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 WSP660 has excellent performance, specifications and wide temperature range at an affordable price, while the WSP350 was designed for lower accuracy measurements at a narrower temperature range.

Model WSP660 PRTs are assembled using our special wire wound RTD elements, assembled into inconel sheaths. The WSP660 PRT has similar accuracy and long-term stability specifications you would find in much higher priced secondary standard PRTs. The WSP660 PRT can be used as a working 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.
Specifications Resistance at 0° C: 100 ohms Temperature range: -200 to 660°C Calibrated Temperature range: -196 to 660°C Temperature coefficient: 0.003925 Ω /Ω /° C minimum Stability: R0 typical drift < 0.03°C after 500 hours at 660° C Thermal shock: R0 typical drift < 0.010° C after 100 times from 25 to 660°C Dimensions: 0.25" dia. x 15" L inconel sheath as standard, custom sizes available Tolerance at 0° C: ą 0.06%, IEC DIN class A Lead Wires: 4 wire Teflon insulated, stranded 22 AGW copper x 6' L	Calibration Each WSP660 includes an ITS-90 NIST traceable calibration with a+, b+, c+, a- and b- coefficients and R vs T table. A padded soft carrying case is also included. Calibrated uncertainty (K=2) -196°C ą0.050°C -38°C ą0.050°C 0°C ą0.036°C 232°C ą0.042°C 420°C ą0.060°C 660°C ą0.080°C
ORDERING INFORMATION: Includes carrying case Catalog number: 7002660 List Price: $895

The model WSP350 PRT is a good choice for lower temperature range work at a lower accuracy. The sheath is of stainless steel construction with a strain free wire wound .3924 alpha sensing element. The WSP350 PRT can be used as a working standard in calibration baths, furnaces, fluidized baths, dry block calibrators or for any other temperature calibration work. Combine it with our model Tecal Accu-Temp RTD indicator for a system with high overall accuracy. The WSP350 PRT includes a NIST traceable ITS-90 calibration with coefficients and R vs T table.
Specifications Resistance at 0° C: 100 ohms Temperature range: -200 to 350°C Calibrated Temperature range: -50 to 350°C Temperature coefficient: 0.003924 Ω /Ω /° C minimum Stability: Meets IEC stability specifications after 250 hours exposure to extremes of temperature range. Typical drift is less than 0.05°C (0.02Ω) at 0°C. Repeatability: Meets IEC requirements. Typical shift less than 0.05°C (0.02Ω) at 0°C after ten cycles over range. Dimensions: 0.25" dia. x 12" L , custom sizes available Tolerance at 0° C: ą 0.06%, IEC DIN class A Lead Wires: 4 wire Teflon insulated, stranded 22 AGW copper x 6' L	Calibration Each WSP350 PRT includes an ITS-90 NIST traceable calibration with a+, b+, a- and b- coefficients and R vs T table. A padded carrying case is also included. Calibrated uncertainty (K=2) -50°C ą0.076°C -20°C ą0.070°C 0°C ą0.050°C 100°C ą0.061°C 350°C ą0.072°C (Calibrations down to -196°C available upon request.)
ORDERING INFORMATION: Includes carrying case Catalog number: 7002617 List Price: $436