Combustible Gas Detector Circuit


Posted on Jun 14, 2012

THE GAS SENSOR is mainly composed of tin dioxide on a ceramic base; the resistance of the sensor varies depending on the concentration of reducing gases in the air. The circuit shown is useful for the detection of dangerous levels of combustible fumes or gases. It uses a comparator circuit to trigger an alarm buzzer. The sensor`s resistant element is connected in series with resistor R1 to form a voltage- divider circuit;


Combustible Gas Detector Circuit
Click here to download the full size of the above Circuit.

R1 is specifically matched to each gas sensor by the manufacturer.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

12 Volt 20 Amp Solar Charge Controller
Design a Unipolar Stepper Motor Controller/Driver and
Simple Emergency Light
mcus for a gas leak alarm
dancing light using 555 timer
Nixie-clock using neon lamps as logic
Application of the constant current source circuit by the W7805
Automatic lighting control circuit diagram composed of optocouplers



Top