MH-Z19C NDIR infrared CO2 sensor module with multicolor wiring harness for Arduino Raspberry Pi and ESP32

MH-Z19C NDIR Infrared CO2 Sensor Module for Arduino, Raspberry Pi & ESP32

SKU AB227

$28.99 USD Shipping & tax calculated at checkout
In stock· Order by 3pm ET and it ships today

MH-Z19C NDIR CO2 sensor module measures carbon dioxide concentration for indoor air quality monitoring. 5V UART/PWM sensor for HVAC, smart home automation, greenhouse, Arduino, ESP32 prototyping.

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Overview

Product Overview

MH-Z19C NDIR Infrared CO2 Sensor Module is a carbon dioxide gas sensor designed to measure CO2 concentration in air using non-dispersive infrared sensing for reliable indoor air quality and environmental monitoring. Ideal for HVAC control, smart home ventilation, classrooms, offices, greenhouses, and prototyping, the MH-Z19C helps detect rising CO2 levels so your system can log data, trigger fans, or automate fresh-air exchange. This compact CO2 sensor module is a popular choice for Arduino, Raspberry Pi, and ESP32 projects focused on air quality, ventilation control, and embedded sensing.

Questions & answers

Frequently asked questions

Yes, the MH-Z19C CO2 sensor is compatible with Arduino. Its digital and analog interfaces allow easy integration with Arduino for environmental monitoring and air quality projects.
The MH-Z19C sensor module is easy to set up, featuring pre-soldered pins for simple connectivity. Connect it to your microcontroller using its digital or UART interface to start monitoring CO2 levels.
The MH-Z19C sensor module uses a non-dispersive infrared (NDIR) method and can communicate through digital pulse width modulation (PWM) or UART interfaces, making it versatile for different electronic setups.
Yes, the MH-Z19C is designed for applications such as smart home ventilation control. It helps detect rising CO2 levels, enabling systems to log data, trigger fans, or automate fresh-air exchange.
If the MH-Z19C sensor readings are inaccurate, first ensure the module is properly connected and calibrated. Check environmental factors that might affect readings. If problems persist, consider using the 30-day returns or support from your retailer.

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What's included

Features & Specs

MH-Z19C ModelUses the MH-Z19C NDIR carbon dioxide sensor module for CO2 monitoring in air.

NDIR SensingMeasures CO2 concentration with non-dispersive infrared sensing for reliable indoor air quality detection.

Monitoring UseSupports indoor air quality, environmental monitoring, and ventilation control applications.

Automation SupportHelps systems log CO2 data, trigger fans, or automate fresh-air exchange as CO2 levels rise.

Controller CompatibilityCommonly used with Arduino, Raspberry Pi, and ESP32 for embedded air quality projects.

Application AreasSuitable for HVAC control, smart home ventilation, classrooms, offices, and greenhouse monitoring.

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