One of the world’s leading manufacturers of Nasal Congestion Measurement, Respiratory Flow Measurement and Audiometry products. Based in the United Kingdom, the company was founded in 1992 by Eric Greig and has been at the forefront of the development of new and innovative products for the nasal measurement, audiometry and respiratory flow markets.

“Our business is dedicated to providing excellent customer service, combined with a commitment to high quality, reliable products and innovation through our research & development team”

Joe O’Neill, General Manager


We manufacture a range of medical equipment and instruments including Acoustic Rhinometer, Rhinomanometer, Rhinospirometer, Audiometers, and the SMART Resuscitation Training System.

In addition, GM Instruments also manufacturers a range of Respiratory Flowheads for use in fields as diverse as Physiology and Pharmacology.

Our SMART Training System is the only training system in the world focused on measuring mask leakage in the resuscitation of newborns and infants.

More information for each product can be found on the relevant page. Alternatively you can contact us directly via any of our channels.


GM Instruments are assessed and registered as conforming to EN ISO 13485:2016 and are CE marked. We also hold product registrations in a number of other countries, such as the USA.

Sign up for the latest news, events and offers from us:

*By signing up, you are consenting to the HCE Medical Group holding your data and contacting you.