MD Diagnostics Ltd design, manufacture and market Carbon Monoxide monitors for breath and environmental CO monitoring as well as Hydrogen breath monitors.

The CO Check breath monitors can be used for Smoking Cessation as well as detecting Carbon Monoxide poisoning. A full range of breath Carbon Monoxide monitors include the CO Check Baby specifically designed for midwives to assess smoking in pregnancy by measuring the foetal carboxyhaemoglobin level. The range also includes the low cost CO Check + and full featured CO Check Pro.

For Emergency Services and First Emergency Responders the CO Screen has been developed to instantly monitor potential CO poisoning by a quick and simple breath test. 


2017 sees the launch of SafeBreath.

SafeBreath™ is a unique solution offering a combined filter and cardboard mouthpiece with >99% protection against both bacteria and viruses. Using SafeBreath™ not only protects from potential cross infection when screening for smoking status but also means you no longer need to use plastic mouthpiece adapters or D pieces!

A full range of calibration gases, disposable mouthpieces and supporting consumables are supplied as well as the quickest service and support direct from the only UK manufacturer of breath monitoring devices.