Used pulled from working unit. Panametrics 156145PR Moisture Probe Sensor Superior performance Film thickness of the oxide layer is critical to the performance of this type of sensor. GE manufactures sensors with an oxide film thickness that causes them to exhibit true absolute humidity, rather than relative humidity response. This critical film thickness also gives the probe quick response and exceptional calibration stability. Intrinsically safe when used in conjunction with certified electronics or zener barriers Superior sensitivity, response speed and calibration stability Optional temperature sensor Calibrations traceable to National Institute of Standards and Technology (NIST) or National Physical Lab U.K. (NPL) Designed for in situ applications or in conjunction with sample conditioning systems True absolute humidity sensor Wide dynamic range