{"title":"Analog CO/Combustible Gas Sensor(MQ9)","handle":"analog-co-combustible-gas-sensor-mq9","url":"/products/analog-co-combustible-gas-sensor-mq9","description":"The MQ-9 is an analog gas sensor module with high sensitivity to carbon monoxide (CO), methane, propane, and LPG. It uses an SnO2 sensing element that changes conductivity in the presence of target gases, making it suitable for both domestic and industrial gas leak detection.\n\nThe sensor operates using a cycle of high and low temperature heating. At low temperature (1.5V heater), it detects CO. At high temperature (5.0V heater), it detects combustible gases such as methane and propane while clearing other adsorbed gases. This dual-mode operation provides reliable detection across multiple gas types.\n\nKey Features\n\n\nMulti-Gas Detection – Detects CO, methane, propane, and LPG\n\nHigh Sensitivity – Responsive to low concentrations of target gases\n\nDual Temperature Cycle – Low temp for CO detection, high temp for combustible gases\n\nSimple Drive Circuit – Easy to interface with microcontrollers\n\nAnalog Output – Conductivity proportional to gas concentration\n\n\nSpecifications\n\n\nSensor – MQ-9\n\nSensing Material – Tin dioxide (SnO2)\n\nTarget Gases – Carbon monoxide (CO), methane, propane, LPG\n\nHeater Voltage – 1.5V (low temp) / 5.0V (high temp)\n\nOutput – Analog (resistance change)\n\n\nIdeal For\n\nDomestic gas leakage detection\nIndustrial gas monitoring\nPortable gas detector projects\nArduino and microcontroller safety projects\n\n\nPackage Contents\n\n1× Analog CO/Combustible Gas Sensor Module (MQ-9)\n\n\nResources\n\nMQ-9 Datasheet (PDF)\n","vendor":"Elecrow","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3575,"title":"Default Title","sku":"EC-SES90101S","price":4.26,"compare_at_price":9.0,"on_sale":true,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}