{"product_id":"mq135-air-quality-gas-sensor-module","title":"MQ135 Air Quality Gas Sensor Module – Harmful Gas Detector","description":"\u003ch2\u003eMQ135 Air Quality Detector Sensor Module\u003c\/h2\u003e\u003cp\u003eWant your project to know when the air in a room is getting bad? The MQ135 module is a popular, low-cost gas sensor for air quality monitors, smart home projects and student FYPs. Connect it to an Arduino or ESP32 and watch it respond when the air changes.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eResponds to gases such as ammonia (NH3), nitrogen oxides (NOx), alcohol, benzene, smoke and CO2\u003c\/li\u003e\n\u003cli\u003eAnalog output (A0) for relative gas level readings\u003c\/li\u003e\n\u003cli\u003eDigital output (D0) with LM393 comparator for threshold alerts\u003c\/li\u003e\n\u003cli\u003eOnboard potentiometer to set the alarm threshold\u003c\/li\u003e\n\u003cli\u003ePower and signal indicator LEDs\u003c\/li\u003e\n\u003cli\u003e5V operation, easy 4-pin interface: VCC, GND, D0, A0\u003c\/li\u003e\n\u003cli\u003eWorks with Arduino, ESP8266, ESP32 and other microcontrollers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIndoor air quality monitors\u003c\/li\u003e\n\u003cli\u003eSmoke and harmful gas alert projects\u003c\/li\u003e\n\u003cli\u003eSmart home and IoT air sensing\u003c\/li\u003e\n\u003cli\u003eVentilation control and school\/university projects\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGood to Know\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eThe sensor has a heater, so it gets warm during use. This is normal.\u003c\/li\u003e\n\u003cli\u003eLet it warm up before taking readings. New sensors give more stable results after a longer first-time burn-in.\u003c\/li\u003e\n\u003cli\u003eReadings are relative. Calibrate in clean air for your own project. Not a certified safety or medical device.\u003c\/li\u003e\n\u003cli\u003eWhen using with 3.3V boards like ESP32, check that the analog output voltage suits your board's input.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Includes\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1 × MQ135 Air Quality Sensor Module\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eAvailable with delivery across Pakistan, including Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad and Peshawar.\u003c\/p\u003e","brand":"Mcustore","offers":[{"title":"Default Title","offer_id":47282292326572,"sku":"MCU-MQ135-AQ","price":310.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/0214\/4940\/files\/MQ135AirQualityDetectorSensorModule.jpg?v=1790353949","url":"https:\/\/www.mcustore.com\/products\/mq135-air-quality-gas-sensor-module","provider":"Mcustore","version":"1.0","type":"link"}