FSUE “SPA “Analitpribor” is one of the leaders of gas-analysis instrument engineering in the Russian Federation. Production of gas-analysis equipment is from 1960.

Designed for alarm generation when carbon monoxide and pre-explosive concentration of flammable gases (methane or propane-butane mixture) in air reaches the preset threshold values.

Application: Installation in boiler houses of varying capacity operated on liquefied and natural gases, and also in non-hazardous areas of other industrial, administrative and residential premises.

Type of gas alarm - fixed.   
Mode of operation - continuous.
 Principle of operation
- carbon monoxide measuring channel - electrochemical; 
- flammable gases measuring channel - thermochemical. 

Possible content of system 
Toxic and flammable gas alarm СТГ-1 (СТГ-1-1 or СТГ-1-2);
Valves КЭГ 9720 ИБЯЛ.685181.001 -01 (DN 20), -02 (DN 25), -21 (DN 32) – 40V;
Valves КЭГ 9720 ИБЯЛ.685181.001 -03 (DN 40), -04 (DN 50), -05 (DN 32), -09 (DN 25), -10 (DN 25) – 220V;
Dispatcher desk ДИСП ИБЯЛ.465213.003.


Basic technical characteristics




Quantity of sensors: on flammable gas (remote) on carbon monoxide (СО) (built-in)

1 / 2

СТГ1-1 / СТГ1-2 permanent

Standard thresholds setting: % LEL (on methane) on carbon monoxide (СО), mg/m3
1- st threshold
2- nd threshold

10±5 or 20±5 20±5 100±25


set by consumer on channel of flammable gases

Generation of dry relay contacts 
when thresholds concentration achieved:
1- st threshold (on СО)
2- nd threshold (on СО)
emergency (on flammable gases)


one group
one group
one group


—30 V; 2,5 А
˜220 V; 5 А

Ambient temperature, °С

-10 ÷ +50


Protection degree



Length of communication cable between gas alarm and flammable gas sensor, m

up to 200

core section 0,75 mm

Overall dimensions, mm, not more
- for sensor unit 
- for control and alarm unit


weight, kg, not more 
0, 5 

Distinctive features

-  Quantity of device versions is reduced with retention of functional capabilities, two versions of  СТГ-1-1 (one flammable gas sensor), СТГ-1-2 (two flammable gas sensors) are manufactured;
-  Availability of  external input “EMERGENCY” that allows to connect devices in loop or to connect them to fire or burglar alarm;
-  Possibility of independent setting of operation modes after device switching on – automatic passing into operating mode with opening of network valve - "О" or switching of emergency alarm with opening of network valve after pressing of the button "reset" - "В";
-  Availability of “TEST” button that allows to check functionality of device and shutoff valves without the use of gas mixtures;
-  Connection by means of terminal connections; 
 - Zero autocalibration when power on or once in 14 days.


Technical characteristics





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    СТГ-1 – toxic and flammable gas alarm


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