The ST-300 is a high accuracy PRT (Platinum Resistance Thermometer),(1/10 DIN) designed to minimize solar load and thermal mass. White heat shrink is used on the cable behind the PRT to reduce solar load. PRT sheath dimensions are 3.18 mm diameter and 63.5 mm length, minimizing thermal mass.
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Measurement Range-50 to 70 CMeasurement Uncertainty0.1 C (from -40 to 60 C), 1/10 DINMeasurement RepeatabilityLess than 0.01 CNon-stability (Long-term Drift)Less than 0.05 C per year (when used in non-condensing environments where the annual average temperature is less than 30 C; continuously high temperatures or continuously humid environments increase drift rate)Equilibration TimeTime Constant ( time for detector signal to reach 63 % following a step change)32 sSelf-HeatingLess than 0.01 C (typical, assuming pulsed excitation of 2.1 V DC), 0.09 C at 5 C (maximum, 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 Requirement2.1 V DCOutput Voltage Range16 to 27 mV DC (assuming input excitation of 2.1 V DC)Current Drain0.21 mA DC (maximum, assuming continuous input excitation of 2.1 V DC)Dimensions57.15 mm length, 3.18 mm diameterMass95 gCable5 m of shielded, twisted-pair wire with santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)Warranty4 years against defects in materials and workmanship