WEEK 22 - SOLDERING AND TESTING GAS SENSOR

Lighter gas is the  easy way to test mq2 gas sensor because the lighter is contain gas LPG. The gas sensor is just detect LPG, i-butane, methane, alcohol, Hydrogen. For test the sensor, the lighter is need to put near to the gas because it late to detect gas. The distance around 5 cm, this because the resistance is high. When the resistance is set to low resistance, the gas sensor is more fast respon. This mean the  resistance value is lower the more fast rspone from sensor.