Target: CO2
Model: MH-Z1311A
Detection range: 0~10000ppm optional
Detection principle: non-dispersive infrared (NDIR) principle
Characteristics: 1. The air chamber adopts electroplating treatment, waterproof and anti-corrosion 2. High sensitivity, low power consumption 3. Excellent stability 4. Temperature compensation, excellent linear output 5.RESET compliant
Size: 32.36x19.5x11.4mm(LxWxH)
Working conditions: DC(5.0±0.1)V
Measurement range: 0~2000 ppm
0~5000 ppm
Resolution and accuracy: 1ppm±(30ppm+3% reading value)(15~35℃) ±(10% reading value)(-10~15℃, 35~50℃)
Response time: T90 < 60s

MH-Z1311A Manual download
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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. 


  • HVAC refrigeration
  • Air cleaner device
  • Indoor air quality monitoring
  • Smart home
  • Ventilation system


  • The air chamber adopts electroplating treatment, waterproof and anti-corrosion
  • High sensitivity, low power consumption
  • Excellent stability
  • Temperature compensation, excellent linear output
  • Provide serial port (UART) output mode
  • Long lifespan
  • Anti-water vapor interference, anti-poisoning 


 Model No. MH-Z1311A
Detection gas CO2
Working Voltage 5.0±0.1V DC
Average Current 150uA (@5V power supply)
Peak Current 90mA (@5V power supply)
Interface Level 3.3 V(Compatible with 5V)
Detection range 0~10000ppm(optional)
Output Signal Serial Port (UART)(TTL level 3.3V)
Preheat Time 10s
Response Time T90 <60 s
Working Temperature -10 ~ 50℃
Working Humidity 0 ~95% RH (No condensation)
Weight 5g
Life Span >10 years


* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.