{"product_id":"mq-7-carbon-monoxide-co-gas-sensor-detector-module","title":"MQ-7 Carbon Monoxide (CO) Gas Sensor Detector Module (MQ7)","description":"\u003ch4\u003eDetect Carbon Monoxide with the MQ-7 Sensor Module\u003c\/h4\u003e\n\u003cp\u003eEnsure safety and monitor air quality with the MQ-7 Carbon Monoxide (CO) Gas Sensor Module. This high-sensitivity module is perfect for DIY electronics projects, alarms, and environmental monitoring systems. It features both analog and digital outputs, providing flexibility for your microcontroller, Arduino, or Raspberry Pi projects.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHigh Sensitivity:\u003c\/b\u003e Reliably detects Carbon Monoxide (CO) concentrations from 10 to 1,000 ppm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDual Output Mode:\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAO (Analog Output):\u003c\/b\u003e Provides a real-time voltage signal that increases with the CO concentration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDO (Digital Output):\u003c\/b\u003e A threshold-based output. When CO concentration exceeds a set point, the output goes LOW.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdjustable Sensitivity:\u003c\/b\u003e An onboard potentiometer allows you to easily set the digital output (DO) trigger threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStatus Indicators:\u003c\/b\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePower LED:\u003c\/b\u003e Lights up when the module is powered.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDOUT LED:\u003c\/b\u003e Lights up when the digital output is triggered (CO detected).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStable \u0026amp; Durable:\u003c\/b\u003e Designed for long service life, stability, and fast recovery times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEasy Mounting:\u003c\/b\u003e Features four screw holes for secure positioning in your project.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003eHow It Works\u003c\/h4\u003e\n\u003cp\u003eThis module is simple to integrate:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cb\u003ePower:\u003c\/b\u003e Connect VCC to 5V and GND to Ground.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAnalog Reading (AO):\u003c\/b\u003e Connect the AO pin to an analog input on your microcontroller (like A0 on an Arduino) to get continuous concentration data.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDigital Alarm (DO):\u003c\/b\u003e Connect the DO pin to a digital input. Use the blue potentiometer to adjust the sensitivity. When the CO level crosses the threshold, the DO pin will output a LOW signal, which can be used to trigger an alarm, LED, or relay.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cb\u003eImportant MQ-7 Note:\u003c\/b\u003e For the most accurate readings, the MQ-7 sensor requires a specific heating cycle: 5V (high) for 60 seconds and 1.5V (low) for 90 seconds. While the module can be operated at a constant 5V for basic detection, advanced users can implement this high\/low voltage cycle for optimal performance as specified by the sensor's datasheet.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eGas Detected:\u003c\/b\u003e Carbon Monoxide (CO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDetection Range:\u003c\/b\u003e 10 - 1000 ppm (CO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOperating Voltage:\u003c\/b\u003e 5V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHeater Voltage (Sensor):\u003c\/b\u003e 5V (High), 1.5V (Low)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOutputs:\u003c\/b\u003e Analog (AO) and Digital (DO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComparator Chip:\u003c\/b\u003e LM393\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 32mm x 20mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003ePackage Includes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 x MQ-7 Carbon Monoxide (CO) Gas Sensor Module\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":46254059192471,"sku":"21PS001131","price":103.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/mq-7-carbon-monoxide-gas-sensor-module.jpg?v=1762592001","url":"https:\/\/scccltd.com\/en-tw\/products\/mq-7-carbon-monoxide-co-gas-sensor-detector-module","provider":"Sun Cheong Computer Company Limited","version":"1.0","type":"link"}