MQ-4 Sensor:
MQ-4 sensor is a gas detecting sensor. This sensor is mainly use to detect Methane, and CNG Gas. This sensor also sensing other flammable gases like Butane and propane. Good sensitivity to Combustible gas in wide range. High sensitivity to Natural gas / CNG. Low sensitivity to smoke, flame. Long life and low cost. Simple drive circuit. There are different MQ series sensor which is used for detecting different gases. List of different MQ series sensor are given below. MQ-2 Methane, Butane, LPG, Smoke. MQ-3 Alcohol, Ethanol, Smoke MQ-4 Methane, CNG Gas MQ-5 Natural gas, LPG MQ-6 LPG, butane MQ-7 Carbon Monoxide MQ-8 Hydrogen Gas MQ-9 Carbon Monoxide, flammable gasses MQ131 Ozone MQ135 Air Qual...