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Micro+ Logo - Smokerlyzer

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+ Logo - Smokerlyzer

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®.

Technical specifications

Scroll left and right for the different technical specifications

Concentration range 0-500ppm
Display Full colour touchscreen
Detection principle Electrochemical sensor
Repeatability ≤±5%
Accuracy ≤±2ppm/5% - whichever is greater
Power 3 x AA (LR6 or equivalent) - up to 1000 minutes; 1 x CR2032 Lithium coin cell
T90 response time <30 seconds
Operating temperature 15-40°C
Storage/transport temperature 0-50°C
Operating/storage/transport pressure Atmospheric ±10%
Operating humidity 15-90% RH (non-condensing)
Storage/transport humidity 0-95% RH (non-condensing)
Sensor operating life 5 years
Sensor sensitivity 1ppm
Sensor drift <5% per annum
Dimensions Approx. 37 x 77 x 140mm
Weight Approx. 215g (including batteries)
Materials Case: polycarbonate/ABS blend with SteriTouch® anti-microbial additive; D-piece™: polypropylene; SteriBreath™: polypropylene
H2 cross sensitivity ≤8%

Micro+™ Consumables

Years of research and vigorous testing ensures our Bedfont® products and consumables are not only safe for consumer use, but compliant with Medical Device Regulations. Use of counterfeit or non-Bedfont® approved accessories and consumables may result in loss of performance and/or damage to your device. This risk of incorrect results could adversely affect patient care. We also remind you that counterfeit and/or non-Bedfont® accessories and consumables do not possess the quality and reliability of the original manufacturer products, nor have they undergone the Toxicology tests to ensure they are fit to be used orally, and therefore their safety and infection control efficacy cannot be guaranteed.

Image of the SteriBreath Mouthpiece

SteriBreath Eco Mouthpieces

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

Image of the D-piece


The D-piece incorporates a one-way valve to prevent air being drawn back from the monitor. The mouthpiece itself has a specifically integrated infection control filter which removes and traps >99% of airborne bacteria and >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.

Image of the One Breath


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.

Image of the Check gas for the Micro+

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.

Micro+™ images

The Micro+™ Smokerlyzer® is our gold-standard carbon monoxide breath test monitor to help people quit smoking.

Image of model holding Micro
Image of model holding Micro
Image of Micro in hand
Image of Micro

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.

Image of the Smoking in Pregnancy Software


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 get in touch with us via our request a quote page. We will try our best to get back to you as soon as we can.