Wireless CO2 sensor

The CMA Science wireless CO2 sensor measures gaseous carbon dioxide levels in the range between 0 and 5000 ppm.
The sensor is equipped with an OLED color display that shows sensor information and measured values. This makes the sensor suitable for use as a standalone measuring instrument.
This wireless CO2 sensor can be used wirelessly via Bluetooth or wired via USB with the Coach 7 or Coach 7 lite programs/apps on computers (Windows and Mac), Chromebooks, and mobile devices (Android and iOS).


The sensor is designed exclusively for measuring gaseous CO2 concentrations, not for measuring CO2 in liquids. Never insert the sensor tube directly into a liquid.
It may take some time for the CO2 measurement to stabilize because the gas door must diffuse through a membrane filter into the sensor probe.
Do not remove the metal cap from the sensor.

Technical specifications:

• Measuring range: 0 .. 5000 ppm
• Resolution: 1 ppm
• Warrantee: 24 months
• OLED display: 0.96” 128 x 64px
• Warm up time: 1 minute at temperatures between 20 and 30°C
• Response time: ~ 65 s to reach approximately 63 % of its final value
• Maximal sampling rate: 1 Hz
• Battery life: 4h when full (rechargeable)
• Connection: Bluetooth 5, Low Energy (Mac, Android, iOS) Bluetooth 2.1, Classic (Windows) or USB-C 2.0

All specifications of the sensor are described it its Product manual.

Suggested biology and chemistry experiments:

• Measuring CO2 levels (respiration) from small animals and insects
• Monitoring CO2 changes in a plant terrarium during photorespiration and photosynthesis in light/dark (combination with the light sensor)
• Measuring CO2 levels during cellular respiration of peas or beans
• Measuring CO2 levels during yeast respiration
• Monitoring production of CO2 during chemical reactions
• Measuring CO2 levels in classroom
• Measuring CO2 changes from decomposing organic matter