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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?

  • Shows patient’s response to treatment, enabling the correct prescription of medication and safer/monitored adjustments
  • Shows patient compliance to medication
  • Aids in differentiating between allergic (eosinophilic) and non-allergic asthma1
  • Shown to be superior to the majority of conventional tests of lung function2
  • Aids in identifying patients who do/do not require on-going treatment3

Why NObreath®?

Using FeNO measurements to evaluate airway inflammation in asthma represents a significant advance in respiratory medicine2, but until now it has been an expensive test to deliver in everyday practice. Recommended by NICE4 and conformed to ERS/ATS guidelines5, the NObreath® FeNO monitor is the essential tool for asthma.

Features and benefits include:
  • Unlimited FeNO testing*
  • Low-cost monitor and consumables
  • Easy-to-use
  • Reliable and accurate results
  • Low maintenance
  • Fully portable and handheld FeNO monitor
  • Colour touch screen
  • Adult and child profiles
  • Ambient NO monitoring
  • CE marked
*Subject to servicing and general wear and tear

Integrating a FeNO monitor into your patient pathway shouldn’t come at a high price; the NObreath® FeNO monitor price is tailored to your usage levels and we are confident we can beat or reduce your alternative/
current FeNO monitor cost. To find out the NObreath® FeNO monitor price and ongoing cost in your area please contact one of our local distributors by clicking ‘PURCHASE’ below.

Benefits to the patient

  • Easy to use
  • The test is quick, easy and non-invasive, to perform2
  • Correct medication can be prescribed
  • Can help to predict and asthma attack6,7


The latest NObreath® literature.

NObreath® consumables

NObreath® mouthpiece

Specifically designed with the latest bacterial filtration to remove >99% of airborne bacteria and >96% of viruses 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 NObreathFlo™ 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.

Technical specification

Concentration range
Colour LCD with touchscreen
Detection principle
Electrochemical sensor
±5ppb/±10% of measured value - whichever is greater*
±5ppb/±10% of measured value - whichever is greater*
3 x AA (LR6 or equivalent) - up to 120 tests; 2 x CR2032 Lithium coin cell
T90 response time
<10 seconds
Operating temperatire
Storage/transport temperature
Operating/storage/transport pressure
Atmospheric ±10%
Operating humidity
10-75% non-condensing
Storage/transport humidity
25-80% non-condensing
Sensor operating life
5 years**
Sensor sensitivity
Sensor drift
<5% per annum
Approx. 152 x 87 x 47mm
Approx. 400g (including batteries)
Case: polycarbonate/ABS blend with elastomeric overmould; NObreathFLO™: polycarbonate/ABS blend; Mouthpiece: polypropylene
CO cross-interference
Breath test time
Adult 12 seconds; child 10 seconds
Warm-up time
<60 seconds
Ambient air test
30 seconds
Maximum ambient operating level
350ppb NO
*Readings of ≥200ppb at temperatures between 20-30°C can decrease accuracy to ±15% of measured value. **Subject to servicing.

NObreath® is a breath nitric oxide (NO) test system intended to measures fractional exhaled nitric oxide (FeNO) in exhaled breath. The device is not currently sold in the USA but can be purchased by clinicians with an Investigational Device Exemption (IDE) to use in clinical studies.


  1. Coumou HBel E. Improving the diagnosis of eosinophilic asthma [Internet]. Taylor and Francis online. 2017 [cited 15 March 2017]. Available from:
  2. Andrew D. Smith, Jan O. Cowan, Sue Filsell, Chris MacLachlan, Gabrielle Monti-Sheehan, Pamela Jackson and D. Robin Taylor. Diagnosing Asthma: Comparisons between Exhaled Nitric Oxide Measurements and Conventional Tests. Am J Respir Crit Care Med Vol 169. pp 473-478, 2004.
  3. D R Taylor, MW Pinenburg, A D Smith and J C D Jongste. Exhaled nitric oxide measurements: clinical application and interpretation. Thorax 2006;61:817-827.
  4. Measuring fractional exhaled nitric oxide concentration in asthma: NIOX MINO, NIOX VERO and NObreath | Guidance and guidelines | NICE [Internet]. 2014 [cited 11 July 2017]. Available from:
  5. ATS/ERS Recommendations for Standardized Procedures for the Online and Offline Measurement of Exhaled Lower Respiratory Nitric Oxide and Nasal Nitric Oxide, 2005; American Journal of Respiratory and Critical Care Medicine; vol. 171: 912-930;2005
  6. Nanda C. Domiciliary exhaled nitric oxide and eosinophilic airway inflammation in adults with asthma. - PubMed - NCBI [Internet]. 2017 [cited 21 September 2017]. Available from:
  7. Harkins M. Exhaled Nitric Oxide Predicts Asthma Exacerbation [Internet]. Taylor & Francis. 2017 [cited 21 September 2017]. Available from:

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.