MH-Z19 carbon dioxide gas sensor (hereinafter referred to as the sensor) is a generic type, small sensors, using non dispersive infrared (NDIR) principle to detect the air in the presence of CO2, with good selectivity and no oxygen dependence and long service life. Built in temperature compensation, with digital output and waveform output, easy to use. The sensor is a high performance sensor which is combined with the mature infrared absorption gas detection technology and the precise optical path design and the excellent circuit design.

Sensor characteristics

High sensitivity, high resolution, low power consumption

Provide UART, PWM waveform, such as a variety of output mode

Temperature compensation, excellent linear output

Excellent stability

Long service life

Anti water vapor interference, not poisoning

Main application

Can be widely used in HVAC refrigeration and indoor air quality monitoring.

Technical index

Product model MH-Z19

Detecting gas carbon dioxide

Operating voltage 3.6 ~ 5.5 DC V

Average current less than 18 mA

Interface level 3.3 V

Measurement range of 0 ~ 0.5% Vol range of optional

Output signal UART

PWM

Preheat time 3 min

Response time T90 < 60 s