{"product_id":"mq-135-air-quality-hazardous-gas-sensor-module","title":"MQ-135 Air Quality \u0026 Hazardous Gas Sensor Module (MQ135)","description":"\u003ch2\u003eMonitor Your Environment with the MQ-135 Air Quality Sensor\u003c\/h2\u003e\n\u003cp\u003eTake control of your indoor air quality with the \u003cb\u003eMQ-135 Air Quality Sensor Module\u003c\/b\u003e. This versatile and low-cost sensor is designed to detect a wide range of harmful gases, making it an essential component for your Arduino, Raspberry Pi, or other electronic projects.\u003c\/p\u003e\n\u003cp\u003eThe MQ-135 is highly sensitive to \u003cb\u003eammonia (NH3), sulfides, and benzene vapor\u003c\/b\u003e. It's also ideal for monitoring \u003cb\u003esmoke, smog, and other air pollutants\u003c\/b\u003e, providing both analog and digital signals to trigger alarms, control ventilation fans, or log data.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDual Output Signals:\u003c\/b\u003e Provides both an \u003cb\u003eAO (Analog Output)\u003c\/b\u003e, where voltage increases with gas concentration, and a \u003cb\u003eDO (Digital Output)\u003c\/b\u003e, which goes low when the set concentration threshold is reached.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable Sensitivity:\u003c\/b\u003e An onboard potentiometer allows you to precisely calibrate the sensitivity and set the trigger threshold for the digital output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClear Indicators:\u003c\/b\u003e Equipped with a \u003cb\u003ePower LED\u003c\/b\u003e and a \u003cb\u003eDO (TTL) output LED\u003c\/b\u003e that lights up when the trigger threshold is crossed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStable \u0026amp; Reliable:\u003c\/b\u003e Features a long service life, reliable stability, and rapid response and recovery times for consistent performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEasy Integration:\u003c\/b\u003e The 4-pin header and mounting holes make it simple to integrate into your projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eApplications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDIY Air Quality Monitors\u003c\/li\u003e\n\u003cli\u003eHome or Factory Gas Leakage Alarms\u003c\/li\u003e\n\u003cli\u003eAutomatic Ventilation Systems\u003c\/li\u003e\n\u003cli\u003eEnvironmental Monitoring Stations\u003c\/li\u003e\n\u003cli\u003eSmoke and Smog Detectors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eModel:\u003c\/b\u003e MQ-135\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSensor Material:\u003c\/b\u003e Tin Oxide (SnO2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Voltage:\u003c\/b\u003e DC 5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCurrent Consumption:\u003c\/b\u003e 150mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSignal Outputs:\u003c\/b\u003e AO (Analog), DO (Digital TTL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAnalog Output (AO):\u003c\/b\u003e 0.1V - 0.3V (in clean air), up to ~4V (at high concentration)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDigital Output (DO):\u003c\/b\u003e TTL 0\/1 (0.1V \/ 5V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 32.4mm x 20.4mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNet Weight:\u003c\/b\u003e 6.95g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eHow to Use \u0026amp; Wiring\u003c\/h4\u003e\n\u003cp\u003eConnecting the module is straightforward:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVCC:\u003c\/b\u003e Connect to 5V Power\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGND:\u003c\/b\u003e Connect to Ground\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDO:\u003c\/b\u003e Digital Output (Connect to any microcontroller digital I\/O pin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAO:\u003c\/b\u003e Analog Output (Connect to any microcontroller ADC pin)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eImportant Note:\u003c\/b\u003e Upon power-up, the sensor requires a \u003cb\u003ewarm-up period of about 20 seconds\u003c\/b\u003e for its readings to stabilize. It is normal for the sensor element to feel warm during operation.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003ePackage Includes:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 x MQ-135 Air Quality Sensor Module\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":46254065877143,"sku":"21PS001309","price":103.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/mq-135-air-quality-sensor-module-main.jpg?v=1777626207","url":"https:\/\/scccltd.com\/en-tw\/products\/mq-135-air-quality-hazardous-gas-sensor-module","provider":"Sun Cheong Computer Company Limited","version":"1.0","type":"link"}