Target: CO2
Model: MH-410D
Detection range: 0~10% Vol optional
Detection principle: non-dispersive infrared (NDIR) principle
Characteristics: 1. High sensitivity, high resolution, low power consumption, Fast response time; 2. Output method: UART, analog voltage signal; 3.Temperature compensation, excellent linear output; 4. Long lifespan;5. Excellent stability;6. Anti-poisons, anti-vapor interf
Size: Φ20 mm×22.6 mm
Working conditions: 3.6~5 V DC(Need to be powered by safety barrier)
Measurement range: 0~2000 ppm
0~6000 ppm
0~1% Vol
0~3% Vol
0~5% Vol
Resolution and accuracy: ±(50ppm+5% reading value)
Response time: T90 < 30 s

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MH-410D infrared gas sensor is a miniature universal intelligent sensor, which adopts NDIR theory to detect concentration of CO2 in air and has good selectivity, stable performance, long life, also is independent of Oxygen. The inside temperature sensor could be used for temperature compensation. This miniature infrared gas sensor is developed by the tight integration of mature infrared absorbing gas detection technology, micro machine workout and superior circuit design. 


Widely used for HVAC refrigeration, industrial-process control and safety protection,agriculture and animal husbandry. 


  • High sensitivity, high resolution, low power consumption, fast response time
  • Output method: UART, analog voltage signal
  • Temperature compensation, excellent linear output
  • Long lifespan, excellent stability, anti-poisons, anti-vapor interference 


Fig1 Main Parameters 

Model MH-410D
Detection gas CO2
Working Voltage 3.6~5VDC (Need to be powered by safety barrier)
Average Current <85mA
Interface Level 3.0V
Detection range 0-10%volOptional (refer Fig2.)
Output Signal UART
0.4~2V (Need to be powered by safety barrier)
Warm-up Time 3 min
Response Time T90<30s
Working Temperature -20°C ~60°C
Working Humidity 0~95%RH (no condensation)
Sizes Φ20x22.6mm
Weight 35g
Life Time >5 years
Defense Grade IP54
Power, communication terminal Intrinsic safety Ui=7.5VDC,Ii=265mA, Pi=0.5W,Ci=10μF,Li=0mH



Fig2. Measuring Range and Resolution

Target Gas Measuring Range Accuracy Note
CO2 0~2000 ppm   ±(50ppm + 5% of Read Value) Temperature compensation
0~6000 ppm Temperature compensation
0~1% VOL Temperature compensation
0~3% VOL Temperature compensation
0~5%VOL Temperature compensation


* 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.