FeNO Testing. Made Simple.
Made Affordable. Without Limitations.

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Quick and accurate measurement of FeNO. Without the expensive consumables and running costs.

The Bedfont® NObreath® is a simple to use, battery-powered handheld monitor that measures Fractional exhaled Nitric Oxide (FeNO) in the breath. The device has been designed for use in almost any clinical setting and can be used to test children as well as adults.

An adult patient blows into the NObreath® for 12 seconds (children exhale for 10 seconds) giving an instant result for FeNO in ppb (parts per billion). The higher the FeNO reading the greater the inflammation in the airways.

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NObreath® in Primary Care >

Reach a diagnosis of Asthma quicker, manage patient medication better, reduce “revolving door patients” and free up valuable clinical time without compromising on quality of care. A quick breath test with instant results.

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FeNO testing without the expensive running costs or contractual obligations. Make your department’s budget go further with NObreath® – FeNO testing at just £3.50 per patient!

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A 12-second test in 4 easy steps.


The mouthpiece

The mouthpiece is supplied wrapped and is a long tube that connects to the front of the monitor. It contains a one-way valve and a viral bacterial filter reducing the risk of cross-infection between patients. A NObreath® mouthpiece can be used multiple times by the same patient reducing the cost per test.


Initiate test

The monitor is easy to operate with its icon-based touchscreen display. Power up the monitor from the button located at the top of the monitor. Monitor warm up time is ≤60 seconds. To initiate the test, simply select the adult or child setting and follow the prompts.


Deep breath in…

When prompted, take a deep breath in and exhale. Very little respiratory effort is required. In order to succesfully complete the test, the breath should be exhaled at a steady flow for the duration of test. Resistance in the mouthpiece and the on-screen incentive help achieve this.


Test complete!

A green tick will appear if it is a good quality test. The reading will display immediatley afterwards as a single value in parts per billion on the screen. In accordance to the NICE guidance2, a reading of >40pbb is considered a positive test providing an indication that airway inflammation is present.

Free FeNO Chart PC Software Included

FeNOchart™ PC software comes free with the NObreath® monitor as standard. It allows for test results stored on the monitor to be downloaded via USB cable to any PC.

The software facilitates the electronic recording of FeNO test results with trending in order to easily track patient compliance to prescribed medication for better management of the condition.

A PDF report option allows for easy export and attachment to any patient record system in just a few clicks.

Key Features.

It can be used on adults and children

With simple on-screen prompts, the NObreath® can be used on both adults and children


Easy to follow icon based menus on a high resolution screen

Get accurate FeNO readings instantly

Obtain readings quickly, saving precious minutes in appointments

On-screen incentives for patient compliance

Ensures correct usage to obtain a good quality FeNO reading

by NICE1

Tried and tested in clinical practice for diagnosis and monitoring of patients with Asthma


Low cost of ownership meaning you won’t need to replace the device after a certain amount of tests

Mouthpiece can be used more than once

Unlike other devices, the mouthpiece can be used by the same person more than once

Free PC Software

Download readings directly from the monitor and maintain a history using the free FeNOchart™ software.

Seconds Warm-Up Time
Grams In Weight
Tests On Fully Charged Battery

Case Studies

FeNO testing has become a valuable tool during respiratory clinics to aid consultants in the diagnosis and differentiation of different respiratory diseases, as well as, the monitoring and managing of the patient’s treatment plan.- Respiratory Unit, University Hospital Llandough, Wales
More studies being uploaded soon...-

Where to buy.

The Bedfont® NObreath® FeNO monitor and all available accessories and consumables are available to purchase exclusively from Intermedical Cardio Respiratory and Primary Care Supplies in the UK

Frequently Asked Questions

Technical Specifications

Concentration Range 0-500ppb nitric oxide
Accuracy ± 5ppb of measured value 50ppb
± 10% of measured value >50ppb
Repeatability ± 5ppb of measured value 50ppb
± 10% of measured value >50ppb
Sensor Sensitivity 1ppb
Breath test time Adult 12 seconds
Child 10 seconds
Warm up time ~60 seconds
Ambient air test  30 seconds
Operating temperature range  10-30ºC (ambient)
Operating relative humidity
10-80% Rh (non-condensing)
Sensor operating life 5 years; subject to correct use, maintenance and service
Detection principle Electrochemical sensor
Maximum ambient operating
350 ppb NO
Power Monitor:

1 x main rechargeable Li-ion battery- Approx. 100
uses on fully charged battery
2 x Li-ion coin cell battery- Approx. 5 years Input: 5V, 0.5A


Input: 5V, 0.5A  Output: 5V, 0.5A


Input: 100-240V ~ 50/60Hz., 0.2A
Output: 5.0V, 1.0A

Battery Operation Life Up to 100 tests Approx.
Display Colour touch screen
Dimensions Approx. 90 x 159 x 59 mm
Weight Approx. 400g
Construction Case & Dock
Polycarbonate/ABS blend with SteriTouch® anti-microbial additiveMouthpiece


1. Measuring fractional exhaled nitric oxide concentration in asthma. Diagnostics guidance. NICE. DG12. Published 2 April 2014

2. Asthma: diagnosis and monitoring of asthma in adults, children and young people – Draft NICE clinical guidance. Published July 2017.

3. Ricciardolo F. Multiple roles of nitric oxide in the airways [Internet]. Multiple roles of nitric oxide in the airways. 2017 [cited 27 March 2017].
Available from: http://thorax.bmj.com/content/58/2/175.info

4. 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.

5. 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.