This is MH-Z19 Infrared CO2 Sensor Module for CO2 monitor. The MH-Z19 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.

The built-in temperature sensor can do temperature compensation; it has digital output an analog voltage output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design, and superior circuit design.

MH-Z19 NDIR infrared gas module is widely used in the HVAC refrigeration and indoor air quality monitoring.

Features :

1. High sensitivity, high resolution.
2. Low energy consumption.
3. Output mode: UART and PWM wave.
4. Temperature compensation, excellent linear output.
5. Good stability.
6. Long lifespan.
7. Anti-interference of water vapor.
8. No poisoning.