Sell YYT MQ series kit MQ-2~MQ-135 9 gas sensor modules MQ-2/MQ-3/MQ-4/MQ-5/MQ-6/MQ-7/MQ-8/MQ-9 best price

The PCB board is shipped in blue or green at random, and there is no difference in its use. Only the color of the PCB board is different. Take care if you mind! ! 9 types of gas sensors Contains: MQ-2 smoke gas sensor MQ-3 alcohol sensor MQ-4 methane sensor MQ-5 Liquefied Gas, Natural Gas, City Gas Sensor MQ-6 Isobutane Propane Sensor MQ-7 Carbon Monoxide Sensor Module MQ-8 Hydrogen Sensor MQ-9 Carbon Monoxide Combustible Gas Sensor MQ-135 air quality detection sensor