| 3s-analyzers |
| ABB Limited |
| Advanced Chemistry Development |
| Aegis Instruments |
| Alcontrol |
| Alphasense Ltd |
| Analytical Technology |
| APEM Limited |
| Applied Rigaku Technologies,Inc |
| Aquaco |
| Aquamatic Ltd |
| Aquaread Limited |
| Arkon Flow Systems Ltd |
| AWE Ltd |
| Belcom Cables Ltd |
| Bernstein Ltd |
| BOC |
| Cambridge Scientific Instruments |
| Camlab Ltd |
| Capilix BV |
| Chelsea Instruments |
| Chem-Lab nv |
| CitySprint (UK) Ltd |
| CIWEM |
| Clairair Ltd |
| ClipperTech Ltd |
| Cogent Environmental Ltd |
| Critical Flow Systems Ltd |
| Crowcon |
| CryoService |
| Csols |
| Detector OY |
| Draeger |
| DTK |
| EHS Data Ltd |
| Endress & Hauser |
| Envirolink |
| Enviromental Technology Publications |
| Environment Agency |
| Environmental Innovations |
| Environmental Scientifics Group |
| Envitech |
| Esslab |
| Flowcheck Ltd |
| Gas Measurement Instruments |
| Gas Sensing Solutions |
| GE Analytical Instruments |
| GFG Europe |
| Hach Lange |
| Honeywell Analytics |
| Hycontrol |
| Hydro Logic Ltd |
| ILM Books |
| ILM Designs |
| Impress Sensors & Systems |
| In-Situ |
| Infra Tec |
| Intellitect Water Ltd |
| International Labmate |
| Isoprime Ltd |
| ITS EUROPE INC. |
| JMS Consultants |
| Jumo UK |
| kepware Technologies |
| Kisters AG |
| MAC Solutions UK |
| Metrohm UK Ltd |
| Modern Water plc |
| Multisensor Systems Ltd |
| National Laboratory Service |
| Nortech Management Ltd |
| OTT Hydrometry |
| Palintest Ltd |
| Partech Instruments |
| PG Instruments |
| Pollution & Process Monitoring Ltd |
| PRA Europe |
| Process Measurement & Analysis |
| Pulsar Process Measurement Ltd |
| Retroflo Ltd |
| Rotek A/S |
| RS Hydro |
| Safe Training Systems Ltd |
| Sampling Systems Ltd |
| Schneider Electric Ltd |
| Scientific and Technical Gases Ltd |
| Sesys Ltd |
| Shawcity |
| Siemens SC |
| Siemens Water Technologies |
| Sigma Aldrich Co Ltd |
| Sira Environmental |
| Siris Environmental |
| Sommer Mess-Systemtechnik |
| Sorbisense |
| StreamLine Measurement Limited |
| STS Sensor Technik Sirnach AG |
| Swan Analytical Instruments UK |
| Technolog Ltd |
| Ten Alps Publishing |
| The Tintometer Ltd |
| Thermo Fisher |
| Thermo Fisher Scientific Clinical Diagnostics Division |
| Trolex Limited |
| UK Trade & Investment |
| UKAS |
| VWR International |
| Water Active |
| Weatherall Instruments |
| Weidmuller |
| Westermo |
| WMA |
| WWT & WET News |
| Xtralis |
| YSI HYDRODATA LTD |
