MQ-9 Gas Sensor Module 12 MHz + and -) on board

+ and -) on board to set temperature and other parameters like turning on trigger temperature

Resistance Value 820k ohm Color Code Grey

5M Ohm Package 0603 Mounting Type Surface mount No

These devices have low on-resistance and optimum switching properties because of their strip layout and an improved vertical structure

It has a special feature that upper Potentiometer between middle and right screw terminal drive some amount of resistance and lower rheostat's between middle and left screw terminal drive remaining resistance

MQ-9 Gas Sensor Module 12 MHz + and -) on boardThis MQ 9 gas sensor is very sensitive to carbon monoxide, methane and LPG. The sensitive material of the MQ 9 gas sensor is SnO2, which has a lower conductivity in clean air. It detects high and low temperature alternations and detects CO at low temperature (heated to 1. 5V). The conductivity of the sensor increases as the gas concentration increases. As the temperature rises (heated to 5. 0 V), it detects methane, propane, combustible gas, etc. and