NObreath®: The Primary Care FeNO Monitor

Recommended by NICE1, this handheld FeNO monitor facilitates better clinical decision making when diagnosing or managing patients with Asthma. From a single breath, the Bedfont NObreath® FeNO monitor can determine whether there is inflammation present in the airways.
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The Bedfont NObreath FeNO monitor

FeNO testing with the Bedfont® NObreath®

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 giving an instant result for FeNO in ppb (parts per billion). The higher the FeNO reading the greater the inflammation in the airways.

The NObreath® is a recommended FeNO device by NICE1

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With NObreath®, FeNO is a simple, straight-forward test to perform.
A 12 second test in 4 easy steps.

The Bedfont NObreath FeNO monitor with mouthpiece and NObreath Flo
Connecting the Mouthpiece onto the Bedfont NObreath FeNO monitor


The practice run

To ensure compliance, you need to exhale through the mouthpiece at a certain flow rate. Connect the mouthpiece to the NObreath® flo and perform a test blow. The ball in the flow indicator needs to be within the white band throughout the duration of the test.

How to use the Bedfont NObreath FeNO Monitor


Initiate test

The monitor is easy to operate with its icon-based touchscreen display. Power on the NObreath®, attach the mouthpiece and select the adult or child setting to initiate the test.

Keep the ball inbetween the white areas of the visual aid to ensure correct flow into the NObreath Flo


Deep breath in…

When prompted, take a deep breath in and exhale. Remember to keep the ball within the white band on the flow indicator. Continue to exhale until the purple status bar is filled and the NObreath® beeps.

Results on the screen on the NObreath FeNO monitor


Test complete!

The reading will display 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.

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

Easy Visual Aid for patient compliance

Ensures correct usage to obtain the most accurate 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

No Computer

The device provides a single reading in ppb. Record FeNO readings as you would record someones Blood Pressure.

Seconds Warm-Up Time
Grams In Weight
Tests On One Set Of Batteries

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 5-300ppb 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 5ppb
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 1-2 years; 6 month warranty
Detection principle Electrochemical sensor
Maximum ambient operating
350 ppb NO
Power 4.5V DC: 3 x AA (LR6 or equivalent) alkaline
Battery Life (1 set of 3 AA
Up to 120 tests
Display Colour LCD with touch screen
Dimensions Approx. 152 x 87 x 47mm
Weight Approx. 400g including batteries
Construction Case – Polycarbonate/ABS blend with
elastomeric overmould NObreathFloTM
– Polycarbonate/ABS blend Mouthpiece –


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:

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.