{"title":"Smoke Sensor - MQ-2","handle":"smoke-sensor-mq-2","url":"/products/smoke-sensor-mq-2","description":"The MQ-2 is a smoke and combustible gas sensor manufactured by Winsen. It detects flammable gases and smoke in a concentration range of 300–10,000 ppm, with particularly high sensitivity to propane and smoke. It's widely used in domestic gas leakage alarms and portable gas detectors.\n\nThe sensing element uses tin dioxide (SnO₂), which has lower conductivity in clean air and higher conductivity when combustible gas or smoke is present. By measuring this change in conductivity with a simple voltage divider circuit, you can convert the sensor's output into usable data. Some calibration is required for accurate readings.\n\nKey Features\n\n\nWide Detection Range – 300–10,000 ppm for combustible gases\n\nHigh Sensitivity – Especially responsive to propane, smoke, methane, and hydrogen\n\nSnO₂ Sensing Element – Reliable resistance-based detection principle\n\nSimple Interface – Analogue output; pair with a breakout board or voltage divider circuit\n\n\nSpecifications\n\n\nSensor Model – MQ-2\n\nDetectable Gases – LPG, propane, methane, hydrogen, smoke, alcohol\n\nDetection Range – 300–10,000 ppm\n\nSensing Material – Tin dioxide (SnO₂)\n\nHeater Voltage – 5 V\n\n\nIdeal For\n\nDomestic gas leak detection\nSmoke and fire alarm projects\nAir quality monitoring prototypes\n\n\n\nWarning: This sensor is intended for hobbyist and prototyping use only. Do not rely on it as a sole safety device for gas leak or fire detection.\n\n\nPackage Contents\n\n1× MQ-2 Smoke and Gas Sensor\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3730,"title":"Default Title","sku":"SF-SEN-17049","price":8.51,"on_sale":false,"in_stock":true,"available_quantity":150,"option1":"Default Title"}]}