--- product_id: 324030553 title: "AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable" brand: "aitrip" price: "$2.35" currency: USD in_stock: true reviews_count: 8 url: https://www.desertcart.us/products/324030553-aitrip-1pcs-mh-z19b-infrared-carbon-dioxide-monitor-sensor-co2 store_origin: US region: United States of America --- # Multi-output: UART, Analog, PWM Wide voltage range 4.5-5.5V DC Built-in temperature compensation AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable **Brand:** aitrip **Price:** $2.35 **Availability:** βœ… In Stock ## Summary > 🌬️ Breathe smarter, live better β€” CO2 sensing redefined! ## Quick Answers - **What is this?** AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable by aitrip - **How much does it cost?** $2.35 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/324030553-aitrip-1pcs-mh-z19b-infrared-carbon-dioxide-monitor-sensor-co2) ## Best For - aitrip enthusiasts ## Why This Product - Trusted aitrip brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Versatile Output Modes:** Seamlessly integrates with UART, analog, and PWM systems - β€’ **Plug & Play Integration:** Ready for HVAC, smart homes, schools, and air purification setups - β€’ **Precision CO2 Detection:** NDIR tech ensures ultra-accurate air quality insights - β€’ **Smart Temperature Compensation:** Maintains accuracy with built-in thermal adjustments - β€’ **Robust Environmental Adaptability:** Operates reliably up to 95% humidity for real-world conditions ## Overview The MH-Z19B is a compact, high-performance NDIR CO2 sensor module offering precise carbon dioxide detection from 0 to 5000 ppm. Featuring built-in temperature compensation and multiple output interfaces (UART, analog, PWM), it ensures seamless integration into HVAC, air quality monitoring, and smart home systems. Designed for durability with up to 95% operating humidity tolerance, it delivers reliable, real-time air quality data for healthier environments. ## Description Full description not available ## Features - MH-Z19B carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose smart small-scale sensor that uses non-dispersive infrared (NDIR) principle to detect the presence of CO2 in the air, with good selectivity and anaerobic Gas dependence, long life and other characteristics - built-in temperature compensation - at the same time with serial output, analog output and PWM output, easy to use - The sensor is a high-performance sensor that combines mature infrared absorption gas detection technology with precise optical path design and sophisticated circuit design - Supply voltage: 4.5~5.5V DC οΌ› Application: HVAC refrigeration equipment Air quality monitoring equipment Fresh air system Air purification equipment Smart home SCHOOL’ ## Technical Specifications | Specification | Value | |---------------|-------| | Operating Humidity | 95 percent | | Alarm | Audible | | Power Source | Gas Powered | | Material Type | gold | ## Product Details - **Brand:** AITRIP - **Power Source:** Gas Powered - **Alarm:** Audible - **Operating Humidity:** 95 percent - **Material:** gold - **Manufacturer:** AITRIP - **UPC:** 701715465831 ## Images ![AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable - Image 1](https://m.media-amazon.com/images/I/61Et+BmEQHS.jpg) ![AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable - Image 2](https://m.media-amazon.com/images/I/61y39sdv25S.jpg) ![AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable - Image 3](https://m.media-amazon.com/images/I/51lzxrvwIrS.jpg) ![AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable - Image 4](https://m.media-amazon.com/images/I/51RHVYEA+YS.jpg) ![AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable - Image 5](https://m.media-amazon.com/images/I/61Hr1HloZFS.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as advertised - Happy camper! *by H***D on November 13, 2022* The media could not be loaded. On arrival, I hooked the sensor up to 5 volts, and sent the output to my rather ancient scope. Movie attached. Scope is set on 0.1 seconds per division on the time axis, and is triggering on the PWM pulse rising edge. Pulse width is thus about 200 milliseconds on room air, and if I blow on the sensor, the pulse width becomes longer. Y-axis voltage is 2v per division, so the pulse height is about 3 volts. A nice Tek digital storage scope would be nice about now, but I'm fresh out.Plan is to hook the sensor to an Arduino, measure the pulse width, and convert the time to ppm CO2. ### ⭐⭐ Unreliable over long periods *by S***E on August 20, 2023* Unsure what to do with this thing. On a fresh boot it seems happy and sends sane-looking values, but eventually it'll just freak out and start sending 5000ppm/122F constantly. Rebooting it fixes it but resets calibration which makes it useless. ### ⭐⭐⭐⭐ DOA, and then all better *by B***L on March 8, 2023* Update: The new sensor works great. Just had some bad luck I guess.Sensor did not show any activity on uart or pwm. Vo seemed to occasionally alternate between 0.54V and 0V. Luckily Amazon is nice when this happens. I will get another one and then update my review. Btw it was indeed a genuine sensor, though there was some light corrosion on the bottom of the board. ## Frequently Bought Together - AITRIP 1PCS MH-Z19B Infrared Carbon Dioxide Monitor Sensor CO2 Detection Sensor Module UART PMW Wave Output 0-5000ppm+Cable - HiLetgo 2pcs DHT22/AM2302 Digital Temperature And Humidity Sensor Module Temperature Humidity Monitor Sensor Replace SHT11 SHT15 for Arduino Electronic Practice DIY --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/324030553-aitrip-1pcs-mh-z19b-infrared-carbon-dioxide-monitor-sensor-co2](https://www.desertcart.us/products/324030553-aitrip-1pcs-mh-z19b-infrared-carbon-dioxide-monitor-sensor-co2) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-22*