• Results instantly displayed 
  • Measurement of foetal carboxyhaemoglobin levels 
  • Single press button to toggle between mothers expired level (ppm) and foetal carboxyhaemoglobin (%FCOHb) level
  • Breath hold countdown timer to guide patients
  • Coloured light indicators to signify smoking level
  • %FCOHb light indicators – Green or Red dependent on levels recorded
  • Measurement of environmental CO levels
  • Supplied with Safebreath mouthpieces to ensure a complete hygiene concept

CO Check Baby

The CO Check Baby has been designed specifically for midwives working in smoking cessation to quickly and efficiently carry out breath tests whilst providing fast accurate results.

Ease of use is key in a busy smoking cessation clinic – from a single breath the results are instantly displayed in parts per million (PPM) and % carboxyhaemoglobin (%COHb), clear visual guidance is also provided with coloured red, yellow and green indicators dependent on the concentration  of exhaled carbon monoxide, indicating if the person is a non-smoker, light smoker, or heavy smoker.

The CO Check Baby will also provide the level of foetal carboxyhaemoglobin. There is a clear correlation between the exhaled carbon monoxide on the pregnant mothers breath and that of the % carboxyhaemoglobin in the foetal blood supply (%FCOHb).

Additionally the CO Check Baby is also capable of detecting environmental CO levels. When the Environmental Capture is enabled, background CO levels are taken into account when carrying out a breath test. If the background levels are 10ppm for example, then when the person is taking a breath test this background reading of 10ppm will be taken into account. Environmental levels are displayed in PPM.

It is widely accepted and acknowledged a non-smoker will perform a test and will display a level of 6ppm or less. A light smoker will perform a test and have a reading between 7 – 10ppm. A smoker will perform a test and have a reading of between 11 – 20ppm and a heavy smoker will display a reading of 21ppm or more.


“We have been using a large number of CO Check Baby and CO Check Pro monitors in helping people to quit smoking and have found them easy to use with excellent support along the way – Health Improvement Nurse, Vulnerable Groups – Scotland.”

“We have been using the CO Check Baby Monitors for some years now and following minor teething problems, with good support have found them to be accurate and effective. Midwifery Teams Midwifery Manager – Hampshire – UK.”

“I have been using the CO Check Baby for breath testing pregnant women that smoke and have found it to be an invaluable tool, MD Diagnostics have shown amazing support to us as a large team of Midwives” – Smoking and Pregnancy Specialist Midwife – Dorset – UK.


Gas Detected – Carbon Monoxide

Concentration Range – 0-99 PPM

Detection Sensor Used – Electrochemical fuel cell

Sensitivity – 0.1 PPM (0-10 PPM range); 1 PPM (10-99PPM range)

Accuracy (repeatability) – 2ppm or +/-5% whichever is greater

Operating Temperature – 5˚ – 35˚ Celsius

Operating Pressure – Atmospheric 10%

Operating Humidity – 30% to 90% RH

Operating Altitude – Sea level to 6000 ft

Storage Temperature – minus 20˚ to + 70˚ C

Storage Humidity – 10% to 90% RH

Hydrogen cross-sensitivity – <12% at 20˚ C

Sensor Life – 2 – 5 years, 2 years’ warranty

Sensor Drift – <2% per month

Display – 128 X 64-pixel Graphic LCD

Power Supply – Single 9V PP3 battery

Weight (approximate) – 160g including battery

Dimensions – 135mm x 65mm x 30mm

*Indicator levels – Green 0 – 6 PPM, Yellow 7 – 10 PPM, Red 11 – 20 PPM, Flashing red 20+ PPM

Results displayedCO PPM (Carbon monoxide parts per million)

%COHb (% carboxyhaemoglobin)

%FCOHb  (% foetal carboxyhaemoglobin)

CO Check Baby – Catalogue Number CO30