Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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user's manual
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.
| Measurement Range | -50 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 | -50 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 |
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