Winsen MH-Z19B NDIR CO2 sensor for indoor air quality monitoring


MH-Z19B 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 compensation; and it has UART output and PWM output.

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It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
HVAC refrigeration
Air cleaner device
Indoor air quality monitoring
Smart home
Ventilation system
Chamber is gold plated, water-proof and anti-corrosion
High sensitivity, low power consumption
Good stability
Temperature compensation, excellent linear output
Multiple output modes: UART, PWM
Long lifespan
Anti-water vapor interference, anti-poisoning

Model No MH-Z19B
Detection Gas CO2
Working voltage 4.5 ~ 5.5 V DC
Average current < 20mA (@5V power supply)
Peak current 150mA (@5V power supply)
Interface level 3.3 V (Compatible with 5V)
Detection Range 0~2000/5000/10000ppm(optional)
Output signal Serial Port (UART) (TTL level 3.3V), PWM
Preheat time 3 min
Response Time T90 < 120 s
Working temperature -10 ~ 50 ℃
Working humidity 0 ~ 95% RH (No condensation)
Weight 5 g
Lifespan > 5 years


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