{"product_id":"mq-137-nh3-gas-sensor-module-for-ammonia-carbon-monoxide-detector-module","title":"MQ-137 NH3 Gas Sensor Module for Ammonia, Carbon monoxide Detector Module","description":"\u003cmeta name=\"description\" content=\"Buy MQ137 NH3 Gas Sensor Module for Ammonia Carbon monoxide Dete online in India at best price from The Tech Depot, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\u003ch1\u003eMQ-137 NH3 Gas Sensor Module for Ammonia \u0026amp; Carbon Monoxide Detection\u003c\/h1\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eMQ-137 Gas Sensor Module\u003c\/strong\u003e is a high-sensitivity semiconductor gas sensor designed for detecting ammonia (NH3) and carbon monoxide (CO) in various applications. This reliable, cost-effective solution is ideal for environmental monitoring, industrial safety systems, and DIY electronics projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eHigh Sensitivity\u003c\/strong\u003e - Detects ammonia concentrations from 10-300 ppm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFast Response Time\u003c\/strong\u003e - Quick gas detection and alert capability\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWide Operating Range\u003c\/strong\u003e - Temperature: -10 degreesC to 50 degreesC\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnalog Output\u003c\/strong\u003e - Easy integration with microcontrollers (Arduino, Raspberry Pi)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLow Power Consumption\u003c\/strong\u003e - Ideal for battery-powered applications\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompact Design\u003c\/strong\u003e - Space-efficient module format\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eParameter\u003c\/td\u003e\n\u003ctd\u003eDetails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSemiconductor MQ-137\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection Gas\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAmmonia (NH3), Carbon Monoxide (CO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10-300 ppm (Ammonia)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnalog (AO pin) + Digital (DO pin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeating Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 minutes (warm-up)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-10 degreesC to 50 degreesC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 degreesC to 70 degreesC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e95% RH max (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 x 27 x 27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~20 grams\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOriginal\/Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eIn the Box:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x MQ-137 Gas Sensor Module (pre-assembled)\u003c\/li\u003e\n\u003cli\u003e1x Jumper wire set (4-pin connector compatible)\u003c\/li\u003e\n\u003cli\u003e1x Technical datasheet \u0026amp; pinout diagram\u003c\/li\u003e\n\u003cli\u003e1x Quick start guide\u003c\/li\u003e\n\u003cli\u003e1x Support documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePin Configuration\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin\u003c\/td\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCC\u003c\/td\u003e\n\u003ctd\u003ePower Supply (+5V)\u003c\/td\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003eGround\u003c\/td\u003e\n\u003ctd\u003eBlack\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\u003eYellow\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\u003eGreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\n\n\u003ch3\u003eIndustrial \u0026amp; Commercial\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAir quality monitoring systems\u003c\/li\u003e\n\u003cli\u003eAmmonia leak detection in refrigeration plants\u003c\/li\u003e\n\u003cli\u003eWastewater treatment facilities\u003c\/li\u003e\n\u003cli\u003eChemical manufacturing safety\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eResidential \u0026amp; Environmental\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHome air quality monitoring\u003c\/li\u003e\n\u003cli\u003eLivestock farm ammonia detection\u003c\/li\u003e\n\u003cli\u003eIndoor environmental sensors\u003c\/li\u003e\n\u003cli\u003eSmart home automation systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEducational \u0026amp; DIY\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eArduino\/Raspberry Pi projects\u003c\/li\u003e\n\u003cli\u003eIoT development platforms\u003c\/li\u003e\n\u003cli\u003eElectronics learning kits\u003c\/li\u003e\n\u003cli\u003eMaker\/hobbyist experiments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eResearch \u0026amp; Development\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnvironmental monitoring studies\u003c\/li\u003e\n\u003cli\u003eGas sensor calibration projects\u003c\/li\u003e\n\u003cli\u003ePrototype development\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetection\u003c\/strong\u003e - The semiconductor sensor detects gas molecules and changes resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Processing\u003c\/strong\u003e - Built-in amplifier converts resistance change to voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput\u003c\/strong\u003e - Provides both analog (0-5V) and digital (HIGH\/LOW) signals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegration\u003c\/strong\u003e - Connect to microcontroller for real-time monitoring and alerts\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eWhy Choose Our MQ-137?\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003e100% Authentic\u003c\/strong\u003e - Sourced from authorized distributors with certification\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality Assured\u003c\/strong\u003e - Tested before shipment\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Support\u003c\/strong\u003e - 24\/7 technical assistance via WhatsApp \u0026amp; Email\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFast Shipping\u003c\/strong\u003e - 7-8 days across India from Bengaluru warehouse\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e7-day warranty on manufacturing defects\u003c\/strong\u003e - Full manufacturer coverage on defects\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrusted Supplier\u003c\/strong\u003e - The Tech Depot's 10+ years of reliability\u003c\/p\u003e\n\n\u003ch2\u003eInstallation \u0026amp; Usage Guide\u003c\/h2\u003e\n\n\u003ch3\u003eQuick Start\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eConnect VCC to +5V power supply\u003c\/li\u003e\n\u003cli\u003eConnect GND to ground\u003c\/li\u003e\n\u003cli\u003eConnect AO pin to analog input (A0) on microcontroller\u003c\/li\u003e\n\u003cli\u003eConnect DO pin to digital input (D2) on microcontroller\u003c\/li\u003e\n\u003cli\u003eAllow 2-minute warm-up time before reading\u003c\/li\u003e\n\u003cli\u003eCalibrate in clean air for accurate readings\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eArduino Code Example\u003c\/h3\u003e\n```cpp\nint analogPin = A0;\nint digitalPin = 2;\n\nvoid setup() {\n Serial.begin(9600);\n pinMode(digitalPin, INPUT);\n\u003cp\u003edelay(120000); \/\/ 2-minute warm-up\u003c\/p\u003e\n}\n\nvoid loop() {\n\u003cp\u003eint analogValue = analogRead(analogPin);\u003c\/p\u003e\n\u003cp\u003eint digitalValue = digitalRead(digitalPin);\u003c\/p\u003e\n \n Serial.print(\"Analog: \");\n Serial.print(analogValue);\n Serial.print(\" | Digital: \");\n Serial.println(digitalValue);\n delay(1000);\n}\n```\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eQ: What's the difference between MQ-137 and other MQ sensors?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eThe MQ-137 is specifically optimized for ammonia (NH3) detection with high sensitivity in the 10-300 ppm range. Other MQ sensors target different gases like methane (MQ-4), LPG (MQ-5), or alcohol (MQ-3).\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eQ: How long does the sensor last?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eWith proper use, the MQ-137 typically lasts 2-5 years. Lifespan depends on operating conditions, frequency of use, and exposure to extreme temperatures.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eQ: Is calibration required?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eYes, for accurate readings, calibrate in clean air during the first use. Most applications use the sensor in relative mode (comparing readings rather than absolute values).\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eQ: Can I use this\u003c\/strong\u003e\u003c\/summary\u003e\u003c\/details\u003e\n\u003ch2\u003eBuy MQ-137 NH3 Gas Sensor Module for Ammonia, Carbon monoxide Detector Module Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eMQ-137 NH3 Gas Sensor Module for Ammonia, Carbon monoxide Detector Module\u003c\/strong\u003e online at \u003ca href=\"https:\/\/thetechdepot.in\"\u003eThe Tech Depot\u003c\/a\u003e - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eMQ-137 NH3 Gas Sensor Module for Ammonia, Carbon monoxide Detector Module\u003c\/strong\u003e with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eMQ-137 NH3 Gas Sensor Module for Ammonia, Carbon monoxide Detector Module\u003c\/strong\u003e at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.\u003c\/p\u003e","brand":"The Tech Depot","offers":[{"title":"Default Title","offer_id":48746495672577,"sku":"TTD-16850","price":2001.28,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/1577\/3185\/files\/57b03e6859b1ccbce61afe9447f8f31f.jpg?v=1778106198","url":"https:\/\/techdepot.in\/products\/mq-137-nh3-gas-sensor-module-for-ammonia-carbon-monoxide-detector-module","provider":"Tech Depot India","version":"1.0","type":"link"}