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Educational Science & Technology
CONTACT US|Tel: 01525 373666

This SmartQ Carbon Dioxide Sensor has now been discontinued.

Please see our latest wireless version for more information.

Wireless Carbon Dioxide Sensor
Carbon Dioxide Sensor (SmartQ)

Carbon Dioxide Sensor

The sensor is designed and optimised to measure carbon dioxide levels found in the air around photosynthesising plants and small, respiring animals and includes two ranges 0 to 10,000 ppm and 0 to 100,000 ppm.

Warranty & Support

All our sensors are supplied with 5 years warranty and lifetime support.

Practical Design

The unique disc shape lets the sensor become the lid for respiration chambers or placed on a desk without the need for clamps and stands. The holes in the casing allow sensors such as Temperature and electrodes e.g. Oxygen, pH, or Conductivity, to be used at the same time or to add materials to the beaker during the course of an experiment.

data harvest co2 sensor
data harvest co2 sensor
Practical Teaching

The Carbon Dioxide Sensor can be used to investigate a number of scientific experiments such as:

  • CO2 levels around a photosynthesising plant
  • Demonstrating the density of CO2
  • Respiration in small animals (e.g. insect larvae) at different temperatures
  • Air quality - monitoring CO2
  • The rate at which CO2 is removed from an enclosed atmosphere using sodium hydroxide or potassium hydroxide
  • Cellular respiration of germinating seeds e.g. peas or beans
  • CO2 level of expired and inspired air
  • Emissions from vehicle exhausts
  • CO2 in composting
  • Elevated CO2 in exercising and post exercise individuals
Your Purchasing Options

For customers outside of the UK, please contact Data Harvest or an overseas distributor within your country.


All available free teacher worksheets for the Carbon Dioxide Sensor

Carbon dioxide in the closed environment

Carbon dioxide in the closed environment

Downloads & Resources

All available downloadable product manuals and firmware for the Carbon Dioxide Sensor

Product Manuals

Download Carbon Dioxide Sensor Manual | Version: 5


Ranges 2, 0 – 10,000 ppm and 0 – 100,000 ppm
Accuracy @ - 25?C, 103 kPa Between 0 – 20,000 ppm = 100 ppm or 10% of value, Between 20,000 – 50,000 ppm = 20% of value, Above 50,000 ppm are qualitative only
Response time 20 seconds
Operating temperature range 5 to 40?C
Operating humidity range 5 to 95% relative humidity; noncondensing

What's in the box

1x Carbon Dioxide Sensor
1x Steel support rod (80 mm long x 10 mm diameter with a M6 thread)

Other Information

The sensor uses absorbance of infrared energy by CO2 to measure levels (the more infrared light is absorbed the greater the concentration of carbon dioxide). This sensor is for measuring gases – not liquid CO2 concentrations. Liquid will permanently damage the Carbon Dioxide sensor. If the sensor is to be used in an environment where there is a risk of condensation e.g. with a plant in a sealed environment, the sensor should be positioned so that any liquid does not come into contact with the sensing element e.g. use the steel rod to clamp the sensor above the plant. The Carbon Dioxide sensor updates its reading every 0.25 of a second (250 milliseconds). The fastest speed that data can be captured is 50 Hz (20 ms). The yield from some chemical reactions may overwhelm the sensor i.e. produce more than 100,000 ppm. This sensor uses large pulses of current so needs an adequate supply of power. See the product manual for power requirement information. Normally the data logger is able to supply sufficient power, but if the sensor is to be operated for more than 8 hours on a battery powered logger, it may necessary to connect a 5 V mains adapter (Product No. 5009) to the power socket on the Carbon Dioxide sensor.