The ST-150 is a 1/8 inch, Class A PRT (Platinum Resistance Thermometer) with an IP67 rating. White heat shrink is used on the cable behind the PRT to minimize heat transfer to the sensor. PRT sheath dimensions are 3 mm diameter and 65 mm length, miminzing thermal mass.
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Measurement Range-50 to 70 CMeasurement Uncertainty0.3 C (-50 to 70 C), Class AMeasurement RepeatabilityLess than 0.01 CLong-term DriftLess than 0.05 C per yearTime Constant ( time for detector signal to reach 63 % following a step change)32 secondsSelf-heatingLess than 0.01 C (typical, assuming pulsed excitation of 2.1 V DC), 0.09 at 5 C (max. assuming continuous input excitation of 2.1 V DC)Operating Environment-50 to 70 C; 0 to 100 % relative humidityResistance at 0 C100 ΩInput Voltage RequirementDatalogger dependentOutput Voltage RequirementDatalogger dependentCurrent DrawDatalogger dependentDimensions57.15 mm, 3.18 mm diameterMass95 gWarranty4 years against defects in materials and workmanship