Gravity: Infrared Carbon Dioxide / CO2 Sensor (0-50000 ppm)

Q: I found the output data is always cyclic variation. Why?

Yes, this is normal for the infrared CO2 sensor, It is using NDIR optical detection principle, the value will be hyperactive. But the finial result is still in the precision range. You can use some filtering algorithm to read the average value.

1. Example Code for Arduino-CO2 Concentration Detection

Upload the code to Arduino Uno, open the serial monitor to check the CO2 concentration.

Reference

Parameter	Value
Gas Detection	Carbon Dioxide (CO₂)
Operating Voltage	4.5 ~ 5.5V DC
Average Current	<85mA
Output Signal	UART
Measuring Range	0 ~ 50000ppm
Accuracy	± (50ppm + 5% reading)
Preheating Time	3min
Response Time	T90 < 30s
Operating Temperature	0 ~ 50 ℃
Operating Humidity	0 ~ 95% RH (no condensation)
Service Life	>5 years
Board Dimension	21 * 27.11 mm/ 0.83 * 1.06 inches
Weight	42 g

Num	Label	Description
1	RX	RX
2	TX	TX
3	GND	GND
4	VCC	VCC
5	Detector connection	Detector connection

Gravity: Infrared Carbon Dioxide / CO2 Sensor (0-50000 ppm)

Specification

Pinout