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MQ-4 High Sensitivity Gas Methane (CNG) Detector Sensor ModuleFeatures-Signal output indicatorDual Signals output (analog output and TTL output)The TT..

MQ-5 Methane LPG Liquid Propane Gas Sensor ModuleFeatures-High sensitivity to LPG, natural gas, town gas.Small sensitivity to alcohol, smoke.Stable an..

MQ-9 Carbon Monoxide, Methane, and LPG Gas Sensor ModuleFeatures-Good sensitivity to CO/Combustible GasHigh sensitivity to Methane, Propane, and COLon..

SeeedStudio Grove Gas Sensor(MQ9)Features-High sensitivity to Combustible gas in a wide rangeStable performance, long life, low costFast responseWide ..