MH-Z1311A Low Power NDIR CO2 Module

  • • Target gas: Carbon Dioxide, CO2
  • • Super low power consumption(<0.2mA)
  • • Great accuracy(+30ppm&3% reading value)
  • • Mini size, easy to integrate
  • • Applications:Smart thermostat, portable CO2 detector, air quality monitor, air purifier

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  • Principle Introduction
Principle Introduction:
 MH-Z1311A carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose, small-scale sensor that uses the principle of non-dispersive infrared (NDIR) to detect CO2 in the air. It has good selectivity, no oxygen dependence, and long life. , Built-in temperature compensation, digital output, easy to use. The sensor is a high-performance sensor made by closely combining mature infrared absorption gas detection technology with precise optical circuit design and sophisticated circuit design.

Applications :
*HVAC refrigeration
*Smart home
*Air cleaner device
*Ventilation system
*Indoor air quality monitoring
Technical parameters :

Tips:For more parameter information, please refer to the latest manual provided by salesman.


Model No.


Detection Gas


Working voltage

5.0±0.1V DC

Average current

<800uA(@5V power supply)

Peak current

90mA (@5V power supply)

Interface level

3.3 V (Compatible with 5V)

Detection Range


Output signal

Serial Port (UART) (TTLlevel 3.3V)

Preheat time


Response Time

T90 < 60 s

Working temperature

-10 ~ 50℃

Working humidity

0 ~ 95% RH (No condensation)


5 g


> 10 years

Reference Circuit :

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