Our field metrology wells provide the best combination of speed, stability, and accuracy in a field calibration temperature source. They are suitable for calibrating thermocouples, RTDs, and PRTs. The 9142/9143/9144 models cover a temperature range from -25 °C to 660 °C. The 9190A Ultra-Cool Field Metrology Well covers a temperature range from -95 °C to 140 °C.
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