| a1-cbiss |  | F1 | AQE |
| ABB Measurement & Analytics |  | D13 & D14 | AQE |
| ABB Measurement & Analytics |  | Q2 & R2 | WWEM |
| Air Liquide UK | | C4 | AQE |
| Air Monitors |  | B3 & C3 | AQE |
| Air Products | | H4 | AQE |
| Alphasense | | I16 | WWEM |
| Analytical Technology | | G7,G8,H6,I7 | WWEM |
| Anatune |  | R3 | WWEM |
| ANB Sensors |  | R9 | WWEM |
| AP Technologies |  | H2 | AQE |
| Aqua Data | | V5 | WWEM |
| Aquamatic |  | K1 & K2 | WWEM |
| Aquaread |  | J10 & J11 | WWEM |
| Ashtead Technology | | G3 | AQE |
| Beka Associates |  | P1 | WWEM |
| Blackline Safety Europe |  | V7 | WWEM |
| Blue Industry and Science | | D3 | AQE |
| Bühler Technologies | | E9 | AQE |
| Burkert Fluid Control Systems |  | V6 | WWEM |
| Cambustion | | G5 | AQE |
| Campbell Associates | | A14 | AQE |
| CEM |  | E8 | AQE |
| Chelsea Technologies |  | Q7 | WWEM |
| Codel International Ltd |  | E4 & F4 | AQE |
| CoGDEM | | A8 & A9 | AQE |
| Cogent Skills | | Q5 | WWEM |
| CSA Group | | I12 | WWEM |
| Detectronic |  | Q8 | WWEM |
| Draeger | | S1 | WWEM |
| Durag Holding | | E3 & F3 | AQE |
| Dustscan | | C10 | AQE |
| DynOptic Systems | | B4 | AQE |
| Earthsense | | D2 | AQE |
| ECH Elektrochemie Halle |  | U2 | WWEM |
| Element |  | D1 | AQE |
| Endress and Hauser (UK) |  | M4 & N5 | WWEM |
| Enotec | | B11 | AQE |
| Envea UK | | F1 | AQE |
| Enviro Technology Services |  | E2 & F2 | AQE |
| Environmental Monitoring Solutions | | F6 & G6 | AQE |
| Envirosoft | | C1 | AQE |
| Envitech Europe |  | A2 | AQE |
| Eramosa Engineering Inc. | | K3 | WWEM |
| Eurotron Instruments | | C5 | AQE |
| EXOR | | P6 | WWEM |
| Flexim Instruments UK |  | Q10 | WWEM |
| Flowquip | | P8 | WWEM |
| Fuel Cell systems | | J7 | WWEM |
| Gambica Trade Association |  | U5 | WWEM |
| Gasmet Technologies (UK) | | B8 & C6 | AQE |
| George Fischer | | N6 | WWEM |
| Grant Instruments | | M3 | WWEM |
| GRUNDFOS Pumps |  | I15 | WWEM |
| Hach |  | J4 | WWEM |
| Hawker Electronics | | O6 | WWEM |
| Helapet |  | A3 | AQE |
| Heraeus Noblelight | | G2 | AQE |
| Hiden Analytical |  | R1 | WWEM |
| HMS Industrial Networks | | K10 | WWEM |
| Horiba | | I5 | WWEM |
| Horiba | | I6 | AQE |
| HWM-Water | | S2 | WWEM |
| ifm electronic |  | J13 & J14 | WWEM |
| In-Situ |  | I13 & I14 | WWEM |
| Infratec | | H3 | AQE |
| International Environmental Technology Publications |  | A10 & A11 | AQE |
| International Labmate |  | A10 & A11 | AQE |
| ITS Europe |  | K5 | WWEM |
| JSB UK & Ireland | | J12 | WWEM |
| Katronic Technologies |  | M1 | WWEM |
| KELLER | | S3 | WWEM |
| Kisters | | I3 & J3 | WWEM |
| Kisters | | I3 & J3 | AQE |
| KNF Neuberger (UK) |  | F5 | AQE |
| Kobold Instruments | | P7 | WWEM |
| Kunak Technologies |  | E10 | AQE |
| Kuntze Instruments | | R4 | WWEM |
| Langham Industrial Controls | | I11 | WWEM |
| LAR Process Analysers | | I1 & J1 | WWEM |
| Leading Edge Power | | L9 | WWEM |
| Limesoft | | A5 | AQE |
| Linkwave Technologies Ltd |  | S6 | WWEM |
| M&C TechGroup |  | D5 | AQE |
| Merck | | L3 | WWEM |
| Metasphere |  | J8 & J9 | WWEM |
| Meteor Communications | | Q11 | WWEM |
| Metrohm UK |  | Q9 | WWEM |
| mirsense | | A4 | AQE |
| National Physical Laboratory | | D15 & D16 | AQE |
| Nivus UK | | M6 & N7 | WWEM |
| OdourNet UK | | A7 | AQE |
| Optical Sciences |  | B6 | AQE |
| Orbital |  | D4 | AQE |
| Palintest | | P13 | WWEM |
| Partech Instruments | | K9 & L7 | WWEM |
| Particle Vision |  | E7 | AQE |
| Photonic Measurements | | R8 | WWEM |
| Picarro |  | D9 | AQE |
| Process Measurement & Analysis | | L5 & M5 | WWEM |
| Protea | | B1 | AQE |
| Pulsar Process Measurement | | O10 & P12 | WWEM |
| Rivertrace Engineering | | R10 | WWEM |
| Rockall Safety |  | O3 | WWEM |
| Rose Plastic UK | | K7 | WWEM |
| Rostech Environmental | | R5 | WWEM |
| Rotorflush Filters |  | T3 | WWEM |
| RS Hydro |  | O7 & P9 | WWEM |
| Scielutions | | D8 | AQE |
| SDI Group | | R6 | WWEM |
| Shimadzu UK | | J5 | WWEM |
| SICK (UK) | | D6 & E6 | AQE |
| Siemens |  | N1 & O1 | WWEM |
| Signal Group | | D11 | AQE |
| Siris Environmental | | I9 | WWEM |
| Skalar UK Ltd | | P14 & Q13 | WWEM |
| SOCOTEC UK | | D7 | AQE |
| STA | | A8 & A9 | AQE |
| Swan Analytical Instruments UK | | T6 & U4 | WWEM |
| TE Laboratories |  | O2 | WWEM |
| Technolog |  | I8 & J6 | WWEM |
| Trihedral | | K6 | WWEM |
| Trolex | | E11 | AQE |
| TSI Instruments | | G4 | AQE |
| Turnkey Instruments | | E13,E14,E15,E16 | AQE |
| Uniper Technologies | | C9 | AQE |
| Valmet | | R7 | WWEM |
| Vega Controls Ltd |  | K8 & L6 | WWEM |
| Verulam Scientific | | P2 | WWEM |
| WeCare4Air |  | G1 & H1 | AQE |
| Wi.Tec-Sensorik |  | E5 | AQE |
| Wireless Innovation | | R11 | WWEM |
| Xylem | | H8, I17 & J15 | WWEM |
