Hydrogen concentration sensor CSH-2 is a stationary device for measuring hydrogen content in explosion hazard areas in underground coal mines. It cooperates with telemetric central station type CST-40, CST-40A or CST-40C through analogue station CSA-1 and CSA-2. It may also cooperate with other devices provided that the terminal of the feeder-measurement line is compatible.
The CSH-2 sensor measures the hydrogen content in the atmosphere in the range of 0.1% H2, 1% H2 and 4% H2 (depending on the version). It is power-supplied from an intrinsically safe source with voltage of 12 V. The measured and processed value of H2 concentration is sent to analogue output which generates a signal of 0.4 to 2V. Additionally, by modulating the analogue value, the output may also work in serial digital mode transmission. The sensor operation in digital mode enables sending (via the CSA-1 or CSA-2 station) the serial number of the sensor and other diagnostic information.
The CSH-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.
Measurement range (sensor versions): |
0,1% H2 with a measuring range of 0 to 0,100 % H2 (0 ÷ 1000 ppm H2) 1% H2 with a measuring range of 0 to 1,000 % H2 (0 ÷ 10000 ppm H2) 4% H2 with a measuring range of 0 to 4,000 % H2 = 100% DGW (0 ÷ 40000 ppm H2) |
Measurement method: |
continuous |
Response time t90: |
≤ 50 s for 0,1% H2 version ≤ 110 s for 1% H2 version ≤ 60 s for 4% H2 version |
Display: |
LCD |
Casing internal protection: |
IP-54 |
Explosion-proof mark: |
 I M1 Ex ia I |
Type test certificate: |
KDB 13ATEX0052 |
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