[shortdesc]Target gas: Carbon Dioxide
Range: CO2(400-2000ppm/400-5000ppm)
Application: HVAC,building ventilation system, indoor air quality monitoring system
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Production Description:
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.
Feature:

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

Application:

HVAC refrigeration
Indoor air quality monitoring.
Smart home appliances
School
Air cleaner

Main technical parameters:

Product Model	MH-Z19B
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)
Measuring range	refer to Table 2
Output signal	UART(TTL interface level 3.3V)
	PWM

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

2 pcs MH-Z19B ndir CO2 sensor for indoor air quality monitoring