The ST-300 is a high accuracy PRT (Platinum Resistance Thermometer) 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
-40 to 70 C
Measurement Uncertainty
0.1 C (from -40 to 60 C), 1/10 DIN
Measurement Repeatability
Less than 0.01 C
Non-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 s
Self-Heating
Less 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
-40 to 70 C; 0 to 100 % relative humidity
Resistance
100 Ω at 0 C
Input Voltage Requirement
2.1 V DC
Output Voltage Range
16 to 27 mV DC (assuming input excitation of 2.1 V DC)
Current Drain
0.21 mA DC (maximum, assuming continuous input excitation of 2.1 V DC)
Dimensions
57.15 mm length, 3.18 mm diameter
Mass
95 g
Cable
5 m of shielded, twisted-pair wire with santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)
Warranty
4 years against defects in materials and workmanship
