GM Instruments 2018-02-12T16:43:05+00:00

GM Instruments

Audiometry, Nasal Measurements and Respiratory Flow Measurements

Manufacturing specialised ‘Ear, Nose & Throat’ (ENT)
and Oto-rhino-laryngology (ORL) medical instruments

Located in Scotland, the company was established in 1992, where a need was identified for specialist medical equipment and accessories within the Ear Nose & Throat (ENT) and Oto-Rhino-Laryngology (ORL) field. Initially these were electronic instruments that were used in Audiology and in the field of Allergy, Rhinology and Pharmacology and more recently in the field of Sleep Study.

Our product categories cover:

  • Nasal Measurement
  • Audiometers
  • Flowheads
  • Newborn Resuscitation

Over the years our product portfolio has grown to include an established range of Respiratory Flowheads (Pneumotachographs) and our newly developed range of Clinical Training Systems for Resuscitation. Our approach to working collaboratively on projects with both Universities, and our distributor network has allowed continued growth in international markets. Listening to and meeting the needs of our customers has led to our reputation for quality, reliability and excellent service.

We have a distributor network that covers over 30 countries and includes:

  • Spain
  • Japan
  • Australia
  • Brazil

For more information visit our website:

GM Instruments

Contact Details

GM Instruments Limited, Unit 6, Ashgrove Road, Kilwinning, KA13 6PU

Tel:  +44 (0)1294 554664

Opening Hours

Sunday Closed
Monday 9am–5pm
Tuesday 9am–5pm
Wednesday 9am–5pm
Thursday 9am–5pm
Friday 9am–5pm
Saturday Closed

Nasal Instruments

We have three instruments that provide a complete study of nasal structure and performance and can be used together or individually to quantify nasal conditions

The Acoustic Rhinometer offers a very rapid and non-invasive examination of the nasal cavity through a nosepiece using a sound pulse technique. It quantifies nasal airway structure in either or both nostrils and offers a static profile of nasal structure during a breath hold maneuver. This indicates where the obstructions are and how severe they are in real units (cm and cm2)

The Rhinomanometer calculates nasal airway resistance by measuring nasal flow and the pressure producing that flow. It quantifies nasal airways resistance in either or both nostrils and offers a physiologically normal, dynamic measurement function. This indicates whether the patient’s airway is within the normal range, or out with it, and can indicate the possibility of a number of medical conditions, such as physical obstruction, allergic rhinitis, chronic sinusitis and septum deviation.

The Rhinospirometer allows the measurement of portioning of airflow between two nasal passages and provides a Nasal Partitioning Ratio. Used with subjects who have a Septal Deviation, clinical work has identified a key ratio, above which subjects are likely to benefit from surgery and below which, they are unlikely to benefit from surgery. It is therefore possible to avoid unnecessary trauma for the patient and save the hospital the costs involved in an operation.

Audiometry Equipment

When monitoring the effectiveness of a hearing conservation program in an industrial situation, or doing audiometry as part of general health screening assessment, the availability of automatic testing and interpretation is invaluable.

We manufacture type 4 pure tone screening audiometers, which are used to screen subjects for noise induced hearing loss as part of a workplace hearing conservation program in industrial and corporate environments. The hearing screening will measure the hearing threshold of a subject and indicate the need for further clinical analysis

We offer two PC based screening audiometers which provide many unique facilities, while still complying with International standards and recommended procedure. Additionally we offer sound reduction headsets, booths, and can advise on independent “competent person” training courses.

Respiratory Flowheads (Pneumotachographs)

We have developed a range of Respiratory Flowheads that can be used with OEM applications in physiology teaching and research, speech analysis systems and home therapy instruments. Our flowheads have been incorporated into products by a number of multinational companies.

Clinical Training Resuscitation Systems

These products are the most recent that we have developed in conjunction with representatives of the Resuscitation Council (UK) and are used for clinical training of Neonatal and Paediatric staff to improve their technique for face mask ventilation on term and pre-term manikins. This range is currently being expanded in response to feedback from medical professionals who would like the same facilities for use with children and adults.