Abstract: A thermochemical combustible gas detector having a resistor bridge including a thermistor which is sensitive to combustible gases and a thermistor which compensates the effects of unmeasured parameters and components upon the former thermistor. The supply diagonal of the bridge is connected to a power source via a compensating voltage stabilizer having an adjusting link and two amplifier-comparator links one of which is auxiliary. The detector further includes two conventional auxiliary resistors which are interconnected in series and form an additional resistor bridge with the thermistors of the main bridge. The input of the first amplifier-comparator link is connected to the measuring diagonal of the main bridge. The input of the auxiliary amplifier-comparator link is connected either to the measuring diagonal of the additional resistor bridge, or to one of the auxiliary resistors.