Nitrogen dioxide sensor CSND-2 is a stationary devices used to measure nitrogen dioxide in explosion hazard areas in underground coal mines. It cooperates with telemetric central station CST-40(A) 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. .
Sensor is power-supplied from an intrinsically safe source with voltage of 12 V. The measured and processed value of gas 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. In this mode the sensor may send (via the CSA-1 or CSA-2 station) the serial number of the sensor and other diagnostic information.
The sensor is a device of M1 category and may thus be used in all underground mines with possible methane or coal dust explosion hazard.
Measuring range: |
0 – 20,00 ppm NO2 |
Measurement method: |
continuous |
Response time t90: |
≤ 40s |
Display: |
LCD |
Casing internal protection: |
IP-54 |
Explosion-proof mark: |
 I M1 Ex ia I |
Type test certificate: |
KDB 07 ATEX 257 |
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