Thermistor Temperature Sensor ST-100

Accurate and reliable thermal sensor manufactured by Apogee.



The ST-100 is a high accuracy thermistor (± 0.1 C from 0 to 70 C), mounted in a waterproof housing, designed for continuous measurement of air, soil, or water.

 SPECIFICATIONS ST-100

 Measurement Range -50 to 70 ˚C
 Measurement Uncertainty 0.1 C (from 0 to 70 C), 0.2 C (from -25 to 0 C), 0.4 C (from -50 to -25 C)
 Measurement Repeatability Less than 0.05 C
 Non-stability (Long-term Drift) Less than 0.02 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)
 Time 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 2.5 V DC); 0.08 C at 5 C (maximum, assuming continuous input excitation of 2.5 V DC)
 Operating Environment -50 to 70 C; 0 to 100 % relative humidity
 Resistance 10,000 Ω at 25 C
 Input Voltage Requirement 2.5 V DC excitation
 Output Voltage Range 0 to 2.5 V DC (assuming input excitation of 2.5 V DC)
 Current Drain 0.1 mA DC at 70 C (maximum, assuming continuous input excitation of 2.5 V DC)
 Dimensions 100 mm length, 6 mm diameter
 Mass 60 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
Manufacturer: Apogee Instruments
Manufacturer code: ST-100
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