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.
High sensitivity, high resolution
Low power consumption
Output modes:UART ,PWm wave.
anti-water vapor interference
Target Gas: CO2
Working voltage: 4.5 ~ 5.5 V DC
Average current: < 60mA (@5V)
Peak current: 150mA (@5V)
Interface level: 3.3 V(Compatible with 5V)
Output signal: UART(TTL interface level 3.3V),PWM,DAC(default 0.4-2V)
Preheat time: 3 min
Response Time: T90 < 120 s
Working temperature: 0 ~ 50 C
Working humidity: 0 ~ 90% RH(No condensation)
Dimension:33 mm×20 mm×9 mm(L×W×H)
Weight: 5 g
Lifespan: > 5 years
Indoor air quality monitoring.
Smart home appliances