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AM1751 Secondary Reference PRT

The AM1751 series of Secondary Reference PRTs offers affordable reference probes for precision temperature measurement and calibration both in the lab and in the field.

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These PRTs feature an accuracy of <0.015°C and short-term stability of <0.007°C. To reach the best performance in stability and repeatability, the sensing element has been specially designed to protect the platinum sensing wire from contamination at high temperatures. A unique supporting structure and filling material provide the best balance among the hysteresis effect, mechanical shock, and thermal shock performance. This high-performance probe fully meets the ITS-90 criteria for reference thermometers.


  • Temperature range: -200°C to 670°C

  • Accuracy: <0.015°C

  • Long term drift: <0.01°C

  • Short term stability: <0.007°C

  • Durable and shock-resistant

  • Temperature Coefficient 0.003925 Ω/Ω/°C

  • W(Ga)>=1.11807

  • Inconel™ sheath

Secondary Reference PRT Datasheet