The GasCheck range of single-beam gas sensors measure a wide range of carbon dioxide (CO2) concentrations, with high levels of accuracy, stability and repeatability. GasCheck instruments are available in 3 measuring ranges, namely 0-3000ppm , 0-3% and 0-10% CO2, by volume. Instrument options include supply of sample gas via a diaphragm pump, or alternatively, by simple diffusion. Additional options include the choice of non-linear (voltage) output signals or linear (voltage or current) outputs. The compact size and low cost of these gas sensors, combined with their performance and reliability, make them a very popular choice where space is restricted, or where purchasing funds are limited.