{"product_id":"winsen-mh-z19e-ndir-co2-sensor-air-quality-monitor","title":"Winsen MH-Z19E NDIR CO2 Sensor Air Quality Monitor","description":"\u003ch1\u003eWinsen MH-Z19E NDIR CO2 Sensor for Air Quality Monitoring\u003c\/h1\u003e\n\n\u003cp\u003eThe Winsen MH-Z19E is a non-dispersive infrared (NDIR) CO2 sensor offering accurate carbon dioxide concentration measurements in a compact, low-power package. It provides both UART serial and PWM output, making it ideal for air quality monitors, HVAC systems, and IoT environmental sensing. With a measurement range of 0–5000 ppm and built-in temperature compensation, it delivers reliable readings for indoor and outdoor applications.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDetection Method\u003c\/td\u003e\n\u003ctd\u003eNDIR (Non-Dispersive Infrared)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0–5000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±(50 ppm + 5% of reading)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eUART (TTL 3.3V), PWM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e4.5–5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWarm-up Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-co2-monitor-kit-mh-z19-sensor-oled-and-ventilation-alert\"\u003eDesktop CO2 monitor with OLED display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-esp32-wifi-relay-controller\"\u003eSmart ventilation controller using relay and WiFi\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-classroom-air-quality-monitor-kit\"\u003eClassroom air quality logger with SD card\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-air-quality-index-dashboard\"\u003eIoT indoor air quality dashboard with MQTT\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe MH-Z19E operates on 5V logic but includes a 3.3V regulator, allowing direct connection to 5V and 3.3V microcontrollers like Arduino Uno, ESP32, and Raspberry Pi. It uses a standard 4-pin header (VCC, GND, TX, RX) and communicates via UART at 9600 baud, making it easy to integrate with popular development boards.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to ground, and TX\/RX to the microcontroller's RX\/TX respectively. For PWM mode, use the PWM pin. Ensure a stable power supply; spikes may affect accuracy. The sensor requires a few minutes of warm-up for optimal readings.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, connect the sensor's TX to Arduino pin 2 (SoftwareSerial RX) and RX to pin 3 (TX), or use hardware serial (RX to RX, TX to TX with voltage level shifting if needed).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the lifespan of the NDIR sensor?\u003c\/summary\u003e\u003cp\u003eThe MH-Z19E has a long operational life of over 5 years under normal indoor conditions, as NDIR sensors have no consumable parts.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it require calibration?\u003c\/summary\u003e\u003cp\u003eThe sensor comes pre-calibrated, but for high-accuracy applications, manual calibration using fresh air (400 ppm) is recommended periodically.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444983685485,"sku":"CDN-0566","price":1810.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_0ef892bb-ef60-40ac-85f7-3934583f237d.jpg?v=1781512675","url":"https:\/\/compoden.com\/products\/winsen-mh-z19e-ndir-co2-sensor-air-quality-monitor","provider":"Compoden","version":"1.0","type":"link"}