MH-Z19B ndir CO2 sensor for indoor air quality monitoring

  • • Target gas: Carbon Dioxide
  • • Range: CO2(400-2000ppm/400-5000ppm)
  • • Application: HVAC,building ventilation system, indoor air quality monitoring system
  • This product has been discontinued and find more CO2 sensors

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  • Principle Introduction
Principle Introduction:
MH-Z19B NDIR infrared gas module is a common type, small size sensor, using non-dispersive infrared (NDIR) principle to detect the existence of CO 2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
Applications :
MH-Z19B NDIR infrared gas module is widely used in
* HVAC refrigeration
*Indoor air quality monitoring.
*Smart home appliances
*Air cleaner
Technical parameters :

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

Product Model MH-Z19B
Target Gas
Working voltage 4.5~ 5.5 V DC
Average current < 60mA(@5V)
Peak current 150mA (@5V)
Interface level 3.3 V(Compatible with 5V)
Measuring range refer to Table 2
Output signal
UART(TTL interface level 3.3V)
Preheat time 3 min
Response Time T90< 120 s
Working temperature
0 ~ 50 ℃
Working humidity 0~ 90% RH (No condensation)
Dimension 33 mm×20 mm×9 mm (L×W×H)
Weight 5g
Lifespan > 5 years
Reference Circuit :

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