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NObreath® FeNO breath monitor

Fractional exhaled Nitric Oxide (FeNO) monitoring

A fractional exhaled Nitric Oxide (FeNO) breath testing monitor to measure airway inflammation and improve asthma management.
The NObreath has been recommended by NICE to measure FeNO and aid in diagnosing asthma, in adults and children, as well as monitoring and managing asthma symptoms of patients.
NObreath® FeNO breath monitor

Why is it important?

Airway inflammation is a central process in asthma and other lung diseases. Being able to measure this inflammation and monitor the patient’s reaction to medication is regarded as gold standard in the management of respiratory diseases. It is increasingly recognised that the measurement of FeNO in particular constitutes a novel way to monitor separate aspects of diseases. These include asthma, COPD and interstitial lung diseases that are not assessed by other means, such as lung function.
The FeNO measurement to evaluate airway inflammation in asthma represents a significant advance in respiratory medicine, but until now this has been an expensive test to deliver in everyday practice.

Why NObreath®?

The monitor incorporates a colour touch screen.
The battery indicator shows you when how much battery you have left and when you need to change your NObreath® batteries.
Has adult and child compatibility profiles.
An internal pump and NO scrubber. 

Benefits to the user

The test is non-invasive, quick and easy to perform.
The measurement shows the patient’s response to treatment, enabling the correct prescription of medication and shows patient compliance.
The test also aids in identifying patients who do/do not require ongoing treatment
It is shown to be superior to the majority of conventional tests of lung function, such as peak flow recording and spirometry.

Product specification

Concentration range
5-300ppb nitric oxide
± 5ppb of measured value ?50ppb ± 10% of measured value >50ppb
± 5ppb of measured value ?50ppb ± 10% of measured value >50ppb
Sensor sensitivity
Breath test time
Adult 12 seconds, child 10 seconds
Response time
Warm up time
~60 seconds
Ambient air test
30 seconds
Operating temperature range
10-30ºC (ambient)
Operating relative humidity (environmental)
10-80% Rh (non-condensing)
Sensor operating life
1-2 years; 6 month warranty
Detection principle
Electrochemical sensor
Sensitivity drift
Maximum ambient operating level
350 ppb NO
4.5V DC: 3 x AA (LR6 or equivalent) alkaline batteries
Battery Life (1 set of 3 AA batteries)
Up to 120 tests
Colour LCD with touch screen
Approx. 152 x 87 x 47mm
Approx. 400g including batteries
Case – Polycarbonate/ABS blend with elastomeric overmould NObreathFlo – Polycarbonate/ABS blend Mouthpiece – Polypropylene

NOBreath® consumables

NOBreath mouthpiece

Specifically designed with the latest bacterial filtration to remove 99.9% of airborne bacteria from the patient's breath. These can be used up to 3 times per patient, dramatically reducing the cost of testing for FeNo.


Eye level flow indicator makes keeping a constant flow during exhalation easy, even for young children. Using the NObreathFloTM and mouthpieces provided allows the user to comply with ATS/ERS guidelines for FeNO testing.

Monitor cleaning wipes

Free from alcohol, ensuring the continued performance of your monitor. Pack contains 50 wipes.


Please click on the links to the right to view our NObreath® manual and catalogue.

Clinical papers

Please click on the links to the right to view clinical papers.

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.