{"product_id":"mq-137-nh3-ammonia-gas-sensor-module","title":"MQ-137 NH3 Ammonia Gas Sensor Module","description":"\u003cdiv class=\"product_info\"\u003e\n\u003ch2 class=\"sing--sub-heading\"\u003e\u003cspan style=\"font-size: 18.72px;\"\u003eMQ-137 Ammonia (NH₃) Gas Sensor Module\u003c\/span\u003e\u003c\/h2\u003e\nThe \u003cstrong\u003eMQ-137 Gas Sensor Module\u003c\/strong\u003e is a high-sensitivity semiconductor sensor specifically designed for detecting \u003cstrong\u003eammonia (NH₃)\u003c\/strong\u003e gas, with partial sensitivity to carbon monoxide (CO). It is widely used in \u003cstrong\u003eair quality monitoring, gas leakage detection, and safety systems\u003c\/strong\u003e. \u003cbr\u003e\u003cbr\u003eThis module provides both \u003cstrong\u003eanalog and digital outputs\u003c\/strong\u003e, allowing flexible interfacing with \u003cstrong\u003eArduino and other microcontrollers\u003c\/strong\u003e. An onboard potentiometer enables easy adjustment of the digital output sensitivity. The sensor requires a short \u003cstrong\u003epre-heating period\u003c\/strong\u003e to stabilize before accurate measurements can be taken.\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eFeatures\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eHigh sensitivity to ammonia (NH₃) gas\u003c\/li\u003e\n\u003cli\u003eWide detection range (5–500 ppm NH₃)\u003c\/li\u003e\n\u003cli\u003eFast response time (less than 1 second)\u003c\/li\u003e\n\u003cli\u003eStable performance with long operational life\u003c\/li\u003e\n\u003cli\u003eAnalog output voltage: 0–5 V\u003c\/li\u003e\n\u003cli\u003eDigital TTL output: 0 V \/ 5 V\u003c\/li\u003e\n\u003cli\u003eAdjustable sensitivity via onboard potentiometer\u003c\/li\u003e\n\u003cli\u003eCan be used as both digital and analog gas sensor\u003c\/li\u003e\n\u003cli\u003eArduino and MCU compatible\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eTechnical Details\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eItem Type: Gas Sensor\u003c\/li\u003e\n\u003cli\u003eModel: MQ-137\u003c\/li\u003e\n\u003cli\u003eTarget Gas: Ammonia (NH₃)\u003c\/li\u003e\n\u003cli\u003eDetection Range: 5–500 ppm (NH₃)\u003c\/li\u003e\n\u003cli\u003eOperating Voltage: 5 V DC\u003c\/li\u003e\n\u003cli\u003eAnalog Output Voltage: 0–5 V\u003c\/li\u003e\n\u003cli\u003eDigital Output Voltage: 0 V \/ 5 V (TTL Logic)\u003c\/li\u003e\n\u003cli\u003eHeater Resistance: 31 Ω ±3 Ω (room temperature)\u003c\/li\u003e\n\u003cli\u003eHeater Power Consumption: ≤900 mW\u003c\/li\u003e\n\u003cli\u003eSensing Resistance: 2 kΩ – 15 kΩ (at 50 ppm NH₃)\u003c\/li\u003e\n\u003cli\u003eSensitivity: Rs (air) \/ Rs (5000 ppm CH₄) ≥ 5\u003c\/li\u003e\n\u003cli\u003eSlope (α): ≤0.6 (R100ppm \/ R50ppm NH₃)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eApplications\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eAmmonia (NH₃) gas detection systems\u003c\/li\u003e\n\u003cli\u003eAir quality monitoring\u003c\/li\u003e\n\u003cli\u003eGas leakage alarm systems\u003c\/li\u003e\n\u003cli\u003eEnvironmental monitoring in hospitals\u003c\/li\u003e\n\u003cli\u003eIndustrial safety and standards maintenance\u003c\/li\u003e\n\u003cli\u003eArduino-based gas sensing projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eLength: 35 mm\u003c\/li\u003e\n\u003cli\u003eWidth: 20 mm\u003c\/li\u003e\n\u003cli\u003eHeight: 28 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 7 g\u003c\/li\u003e\n\u003cli\u003eCompact PCB-mounted sensor module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePackage Includes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds ls-n\"\u003e\n\u003cli\u003e1 × MQ-137 Ammonia (NH₃) Gas Sensor Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"Default Title","offer_id":48612957028604,"sku":"KG1324","price":1429.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/files\/NH3AmmoniaGasSensorModule_1.jpg?v=1767610048","url":"https:\/\/kitsguru.com\/products\/mq-137-nh3-ammonia-gas-sensor-module","provider":"KitsGuru","version":"1.0","type":"link"}