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Quick Details

  • Place of Origin: Henan, China (Mainland)
  • Brand Name: Winsen
  • Model Number: MH-Z19
  • Usage: Gas Sensor
  • Theory: Optical Sensor
  • Output: UART, PWM
  • Target Gas: CO2
  • Type of Sensor: Infrared(NDIR) principal
  • Detection Range: 2000ppm, 5000ppm optional

Packaging & Delivery

Packaging Details Inner packaging: foam cushion Outer packaging: carton
Delivery Time within 5 working days after payment


MH-Z19 2000ppm CO2 sensor


Product Description



MH-Z19 2000ppm CO2 sensor NDIR Infrared gas module is a common type, small size sensor, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature sensor can do temperature compensation; and it has digital output and analog voltage output. This commons type infrared gas sensor is developed by the tight integration of mature infrared absorbing gas detection technology, Precision optical circuit design and superior circuit design.



HVAC, indoor air quality monitoring, industrial process, safety and protection monitoring, agriculture and animal husbandry production process monitoring.


Main functions and features

  • High sensitivity, High resolution
  • Low power consumption
  • Output modes: UART, PWM wave 
  • Quick response
  • Temperature compensation, excellent linear output                        
  • Good stability
  • Long lifespan
  • Anti-water vapor interference
  • No poisoning

Technical specification




Working voltage

4.5 V to 5.5 V DC

Average current

17 mA at 5V power supply

Interface level

3.3 V

Output signal


Warm-up time


Response time

T90 < 45s

Working temperature

0℃ ~ 50℃

Working humidity



10 g


>5 years



Target GasMeasuring RangeAccuracyMark
Carbon Dioxide(CO2)0~2000ppm±(50ppm +5%reading value)Temperature Compensation
0~5000ppmTemperature Compensation




Packaging & Shipping


10pcs/foam plate, then packed in carton.

for small order, packed in bubble bags.



Company Information


We are ISO9001: 2000 certificated enterprise, and all our products gained RoHS, CE, and UL (USA) certifications.

Currently, Winsen has gained over 60% gas sensor market share in China and exported products to over 80 countries worldwide. 


Welcome to our factory.


Contact Us


Telephone:  86-371-67169097

Fax: 86-371-60932988

Mail: sales(at)winsensor.com


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China (Mainland) | Manufacturer, Trading Company
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