Winsen Low Power NDIR CO2 Sensor MH-Z1311A
A highly compatible NDIR CO2 sensor with a power consumption of less than 1mAh.
CO2 sensors
Sensirion SCD30 dual-channel NDIR CO2 Sensor
One of the best options. In some cases it is even the only recommended option.
The Sensirion SCD4x CO2 sensor (SCD41 and SCD40)
This CO2, temperature and humidity sensor is much more than just a pretty face on a slim body...
CO₂ Meter with MQ-135 sensor (Don't miss it, it's not what it looks like)
In this article I am going to tell you what you have to do to mount a CO2 meter with a MQ-135 (sic) sensor. An easy and cheap tutorial (it's free). I hope that, if you are reading this article, it is because you have thought about building an easy and cheap meter with a MQ-135 sensor and ... Read more
The CO2 sensor bible MH-Z19B
Discover all the secrets of the MH-Z19B CO2 sensor in one place. An inexpensive, accurate (for the price) and very easy to use CO2 sensor.
Comparison CO2 sensors MH-Z19B vs Senseair S8
Here you will find the differences and similarities between the MH-Z19B and Senseair S8 CO2 sensors.