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Micro+ Smokerlyzer CO breath test

CO breath and foetal %COHb %FCOHb monitor to help people stop smoking

The Micro+™ Smokerlyzer® CO monitor is the new and improved version of the revolutionary Micro+™ Smokerlyzer®. The Micro+™ Smokerlyzer® is a longstanding benchmark device used in clinical trials and research and is the one CO monitor for all your testing needs.

Micro+ Smokerlyzer CO breath test

Why Micro+™?

The Micro+™ is the one CO monitor for your every need, including use in clinical research and smoking cessation services. It has multiple patient profiles for adults and adolescents, but also carbon monoxide breath testing for pregnant smokers, with the ppm reading and %COHb for the mum-to-be plus the foetal ppm reading and %FCOHb conversion.

Why is it important?

It provides a visual aid to motivate smokers to quit and improve their quality of life.

Benefits to the user

The monitor provides instant results shown in exact ppm, %COHb and %FCOHb, which makes recording and interpreting patient’s results quick and easy.
Analyses carboxyhaemoglobin and carbon monoxide ppm levels.
The colour touchscreen is quick and easy use.
There is automatic calibration and D-piece™ renewal reminders to prolong the life of your monitor, ensure accurate readings and increase infection control.
The monitor has built in SteriTouch® technology to ensure optimum infection control.
There is the familiar green, amber and red traffic light system, making CO levels instantly identifiable to patients, whilst acting as a motivational tool to help them quit smoking.
The monitor provides adult and adolescent profiles to ensure maximum motivation to stop smoking. Testing modes for adults, adolescents and pregnant women.
D-pieces are used in conjunction with the monitor to filter out 99.9% of airborne bacteria and single-use SteriBreath™ mouthpieces for excellent, low cost infection control.1
Five-year warranty for absolute peace of mind.
The Micro+™ has storage for up to 100 readings and personal profiles.
The monitor is PC interactive with COdata+™ software, free with Micro+™ Smokerlyzer®.   


The latest literature for the Micro+™ Smokerlyzer®.

Technical specification

Concentration range
Full colour touchscreen
Detection principle
Electrochemical sensor
2ppm/5% - whichever is greater
3 x AA (LR6 or equivalent) - up to 1000 minutes; 1 x CR2032 Lithium coin cell
T90 response time
<30 seconds
Operating temperature
Storage/transport temperature
Operating/storage/transport pressure
Atmospheric ±10%
Operating humidity
15-90% non-condensing
Storage/transport humidity
Sensor operating life
5 years
Sensor sensitivity
Sensor drift
<5% per annum
Approx. 37 x 77 x 140mm
Approx. 215g (including batteries)
Case: polycarbonate/ABS blend with SteriTouch® anti-microbial additive; D-piece™: polypropylene; SteriBreath™: polypropylene
H2 cross sensitivity

Micro+™ Consumables

SteriBreath™ mouthpieces

SteriBreath™ mouthpieces for use with Bedfont® breath analysis monitors, combining ease of use with optimum infection control.


The D-piece™ incorporates a one-way valve to prevent air being drawn back from the monitor. The mouthpiece itself is specifically designed with integrated filtration to remove: >99% of airborne bacteria, >96% of viruses and any moisture from the patient’s breath1. The D-piece™ should be changed every four weeks or more often if visibly soiled. An automatic reminder will appear on the screen every 28 days.


The OneBreath™ mouthpiece is a single-use bacterial filter mouthpiece and can be attached directly to the monitor to take a breath sample. The OneBreath™ incorporates a one-way valve and an infection control filter, which are proven to remove and trap >99.9% of airborne bacteria1.

Monitor cleaning wipes

Free from alcohol to ensure continued performance of your monitor. Products containing alcohol cannot be used on any of the Smokerlyzer® range. Pack of 50 wipes.

Check gas for the Micro+™

To ensure optimum performance or if you suspect a sensor drift you can perform a function check on the Micro+™ using 20ppm CO gas, 1 x calibration adapter and 1 x regulator.

Smoking in Pregnancy Software

Smoking in Pregnancy is a software specifically designed to help mums-to-be quit smoking. Compatible with the Micro+™ and piCObaby™ Smokerlyzer®. Once the monitor is connected to the computer, it uses a traffic-light colour system and shows the live CO reading of the expectant mother as well as the %FCOHb conversion. As seen on BBC’s Misbehaving Mums, the Smoking in Pregnancy software is a valuable tool to help expectant mothers quit smoking.


1.Public Health England. An Evaluation of Filtration Efficiencies Against Bacterial and Viral Aerosol Challenges Report No. 17/001. London: Public Health England; 2017.

Where can I buy?

If you would like more information or would like to purchase one of our monitors please select the country you are in on the right hand side. A full list of distributors in your area will be displayed.