{"product_id":"mq136-hydrogen-sulfide-gas-sensor-module","title":"MQ136 Hydrogen Sulfide Gas Sensor Module","description":"\u003ch2\u003eMQ136 Hydrogen Sulfide Gas Sensor Module — H2S Detection\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eMQ136\u003c\/strong\u003e is a semiconductor gas sensor designed to detect hydrogen sulfide (H2S) — a toxic, flammable gas with a characteristic rotten egg smell. It uses a SnO2 sensing element that changes resistance in the presence of H2S. With analog and digital outputs, it's ideal for safety monitoring in sewage treatment plants, industrial facilities, and laboratory environments using Arduino or ESP32.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater Voltage\u003c\/td\u003e\n\u003ctd\u003e5V ±0.1V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog (AO) + Digital (DO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Gas\u003c\/td\u003e\n\u003ctd\u003eHydrogen Sulfide (H2S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Range\u003c\/td\u003e\n\u003ctd\u003e1 ppm – 200 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreheat Time\u003c\/td\u003e\n\u003ctd\u003e~20 seconds (minimum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Humidity\u003c\/td\u003e\n\u003ctd\u003eLess than 95% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003ePinout\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eName\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCC\u003c\/td\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e5V Supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003eGround\u003c\/td\u003e\n\u003ctd\u003eGround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDO\u003c\/td\u003e\n\u003ctd\u003eDigital Output\u003c\/td\u003e\n\u003ctd\u003eHIGH when gas exceeds threshold (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAO\u003c\/td\u003e\n\u003ctd\u003eAnalog Output\u003c\/td\u003e\n\u003ctd\u003eVoltage proportional to H2S concentration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSelective detection of hydrogen sulfide (H2S) gas\u003c\/li\u003e\n\u003cli\u003eDual output: analog for concentration measurement, digital for threshold alarm\u003c\/li\u003e\n\u003cli\u003eAdjustable sensitivity via onboard potentiometer\u003c\/li\u003e\n\u003cli\u003eFast response and recovery time\u003c\/li\u003e\n\u003cli\u003eCompatible with Arduino, ESP32, STM32, PIC\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSewage and wastewater treatment plant safety\u003c\/li\u003e\n\u003cli\u003eIndustrial H2S leak detection and alarms\u003c\/li\u003e\n\u003cli\u003eMining and confined space safety monitoring\u003c\/li\u003e\n\u003cli\u003eLaboratory gas detection systems\u003c\/li\u003e\n\u003cli\u003eAgricultural biogas monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eShop Related Sensors at Embeded Studio\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mq131-ozone-gas-sensor-module\"\u003eMQ131 Ozone Gas Sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mics6814-multi-gas-sensor-module\"\u003eMICS6814 Multi-Gas Sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mq9-carbon-monoxide-gas-sensor\"\u003eMQ9 Carbon Monoxide Sensor\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Embeded Studio","offers":[{"title":"Default Title","offer_id":60779083039090,"sku":"MQ136-MOD","price":2500.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/7935\/3202\/files\/f443d4da5a289b6dea96546d31db9e9e.webp?v=1765177837","url":"https:\/\/embededstudio.com\/products\/mq136-hydrogen-sulfide-gas-sensor-module","provider":"Embeded Studio","version":"1.0","type":"link"}