Humidity and temperature sensor CSHT-2 is a stationary device for measuring humidity and temperature content in explosion hazard areas in underground coal mines. It cooperates with telemetric central station CST-40(A)(C) through analogue station CSA-1 or CSA-2. It may also cooperate with other devices provided that the parameters of terminal of the feeder-measurement line are compatible.
CSHT-2 sensor provides humidity measuring range from 0 to 100% and temperature measuring range from -20 to 50°C. It is power-supplied from an intrinsically safe 12 V source. Measured and processed values of humidity and temperature are sent to a separate analogue outputs which generate a signal of 0.4 to 2V. Additionally, by modulating the analogue value, the output may also work in serial digital transmission mode. Output operation in digital mode enables sending to the central station of the CST-40(A) system (via the CSA-1 or CSA-2 station) measurement values of higher precision, sending diagnostic information and the manufacturer’s serial number of the sensor. The CSHT-2 sensor is a device of M1 category and may thus be used in all underground mines with possible methane or coal dust explosion hazard.
During its normal operation, as requested by the central station, the humidity and temperature sensor sends measurement data and other information concerning its operation.
Measuring range: |
Humidity 0÷100%RH Temperature -20÷50oC |
Measurement method: |
continuous through diffusion |
Response time t90: |
for humidity measurement ≤ 4s, for temperature measurement ≤ 30s. |
Casing internal protection: |
IP-54 |
Explosion-proof mark: |
 I M1 Ex ia I |
Type test certificate: |
KDB 08 ATEX 132 |
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