Designed for:
01. Power supply of gas alarms ДАТ-М, alarms СТМ-30-10 – СТМ-30-16, gas analyzers  ДАХ-М, ДАК, ДАМ, potentiometric analyzers of ion activity АП430-02 (hereafter – detectors);
02. Measurement of output current signals of detectors on each channel;
03. Generation of light and sound alarm when values exceed/drop below the set threshold values along with simultaneous switching of “dry” relay contacts.

Application: 
Detection of pre-explosive concentrations of flammable gases and vapors, monitoring of hazardous substances and oxygen content in the air of indoor working area and outdoor facilities of explosion- and fire-hazardous plants and facilities of chemical, petrochemical and petroleum refinery industries.

Units are fixed automatic devices.

Basic technical characteristics

БПС-21М has 1, 2, 4, 7, 8, 11, 12 monitoring channels and three alarm thresholds.

Other technical characteristics

Note: in БПС-21М name
- В – for operation with detectors with intrinsically safe circuits
- Б – without indication
- Ц – digital indication
- Т – current output

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