
Recom Industriale S.r.l.
- Genova, Italia
- http://www.recomindustriale.com
Recom Industriale s.r.l. designs, builds and integrates Safety System Solutions for Gas Detection providing a "turnkey" service for all sizes of projects.

ACS - Alcohol Countermeasure Systems Corp.
- Toronto, Ontario, Canada
- http://www.acs-corp.com
Breath alcohol testing technology.

Gilian
- St. Petersburg, Florida, U.S.A.
- http://www.sensidyne.com
Sensidyne Manufactures the World’s Most Dependable Air Sampling Pumps.

Helmut Hund
- Wetzlar, Germany
- https://www.hund.de
Dust monitoring equipment for work place monitoring

Huberg
- Coventry UK
- https://www.qedenv.com/products/?tags=1562
Products and solutions for gas detection

Kitagawa
- Shimonoge, Kanagawa, Japan
- http://euro-gasman.com/detector-tubes.html
Gas detector tube and hand aspirating piston pump.


RAE Systems, Inc.
- San Jose, California, U.S.A.
- http://www.raesystems.com
Instruments for the detection of gases and vapors toxic pollutants, oxygen and flammable, available in both fixed aand portable version. Gas revealing colorimetric vials. Instruments with electrochemical sensors, catalytic, PID photoionization and NDIR. The company is a leader in portable photoionization PID, PPM and PPB level, for the measurement of VOC (Volatile Organic Compounds).

Riken Keiki
- Azusawa Itabashi-Ku, Tokyo 174-8744 Japan
- http://www.rikenkeiki.co.jp/english
Pioneer of a gas alarm gas detector / alarm

Rivertrace Engineering Ltd
- Redhill, England
- http://www.rivertrace.com/
Rivertrace Engineering Ltd produce a range of products that meet and exceed the I.M.O. resolutions MEPC 107(49) and MEPC 108 (49) relating to water discharges from ships.

Teledyne Gas Measurament Instruments
- United Kingdom
- https://www.teledynegasandflamedetection.com/
Teledyne Gas & Flame Detection has become one of the largest manufacturers of gas and flame detection products.

Zefon
- Ocala, Florida, U.S.A.
- http://www.zefon.com/
Air sampling equipment: filter cassettes, membrane filters, tedlar bag and respirable dust cyclones.