CSM-3i methane detector is equipped with infrared measurement chamber providing measurement in the range of 0-100% CH4 and one or two (UW) outputs to control equipment switching off power supply when the preset alarm thresholds have been exceeded as well as two two-stage inputs to control the status of contacts and lines of connected devices. Its autonomous power supply (battery) supplies the methane sensor system when the supply line is disconnected. The communication with the methane detector is carried out by means of digital transmission through the feeder-measurement line of the central station and through the type KR-2 calibrator. The sensor displays the current value of methane concentration measurement.
The CSM-3i sensor is a device of M1 category and may thus be used in all underground mines with possible methane or coal dust explosion hazard.