1、 Introduction to Infrared Carbon Dioxide Sensor Module

The BYC11-CO2 infrared carbon dioxide sensor module adopts the NDIR infrared absorption detection principle, combining patented optical paths, precision circuits, and intelligent software to form a universal infrared CO2 sensor module. BYC11-CO2 uses a single light source and dual channel detector to achieve spatial dual path reference compensation. The microprocessor performs signal acquisition, processing, and output to achieve environmental temperature compensation, correct nonlinear relationships in principle, and have multiple output forms. It has the unique characteristics of NDIR products, such as good selectivity, high sensitivity, no oxygen dependence, and long lifespan.

2、 Application fields of infrared carbon dioxide sensor module

BYC11-CO2 can be widely used in HVAC, refrigeration, fresh air control, indoor air quality monitoring, agricultural and livestock production process monitoring. It can be installed in intelligent buildings, ventilation systems, controllers, wall mounted use, robots, automobiles and other applications, and can also be used for air quality monitoring in other narrow spaces.

3、 Technical parameters of infrared carbon dioxide sensor module

Technical Parameter	BYC11-CO2
Detect gas	Carbon dioxide (CO2)
Detection Principle	Double wave infrared principle
measuring range	400-4000ppm
resolution	1ppm
accuracy	± 75ppm ± 3% reading
Sensor lifespan	More than 5 years of service life
Warm-up time	Less than 30 seconds operable, less than 15 minutes full precision
sampling interval	3S
response time（T90）	＜150S
Nonlinear	Less than 1% FS
repeatability	±2%
Supply Voltage	DC5V
power consumption	﹤120mA (average)<>80mA (peak value)
signal output	UART and PWM
Pin Definition	PIN1：TX PIN2：RX， PIN3:PWM, PIN4:GND, PIN5: VCC
work environment	-20～50℃； 0-95% RH (no condensation)
Environment	-40～60℃； 0-100% RH (no condensation)
Weight/Size	64Mm (length) × 20Mm (width) × 11.5Mm (height)
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