Antech Calibration Services (Trescal Limited)  (Great Yarmouth)
	Endress+Hauser Ltd  (Manchester, UK)
	HBM United Kingdom Ltd  (Millbrook)
	Insteng Process Automation Ltd   (Cardiff)
	Lee-Dickens Ltd  (Kettering)
	Omega Engineering Ltd  (Irlam)
	Pico Technology  (St Neots)
	RS Components Ltd  (Corby)
	Status Instruments Ltd  (Tewkesbury)
	Tempcon Instrumentation Ltd  (Ford, Nr. Arundel, U.K.)
	ABB Process Automation (ABB Instrumentation)  (St Neots)
	Absolute Calibration Ltd  (Portchester)
	ARI Industries  (Addison, USA)
	Automatic Systems Laboratories Ltd  (Milton Keynes)
	British Rototherm Co Ltd(Thermocouple Instruments)  (Port Talbot)
	Calex Instrumentation  (Leighton Buzzard)
	Conax Technologies  (Buffalo, USA)
	CP Instrument Co  (Hertfordshire)
	Digital Measurement Metrology Inc (Frode Pedersen)  (Brampton, Canada)
	Electronic Temperature Instruments Ltd  (Worthing)
	Exergen Corporation  (Watertown, USA)
	Fast Heat UK  (Eastbourne)
	Foxwell Instruments  (Evesham)
	H&B Sensors Ltd   (Bognor Regis)
	Hawco Ltd  (Nr Goddalming)
	Helium Projects Ltd (formerly AJ Thermosensors)  (Worthing)
	Heraeus Electro-Nite  (Chesterfield)
	Honeywell Control Systems Ltd  (Bracknell)
	IMI Scott Ltd  (Manchester)
	Industrial Interface Research  (Cheltenham)
	Industrial Pyrometer  (Birmingham)
	Isothermal Technology  (Southport)
	Jaquet UK  (Reading)
	JUMO Instrument Company Ltd  (Harlow)
	Labfacility Ltd  (Bognor Regis)
	Measurement Technology Ltd
	Mobrey Limited  (Slough)
	Moore Industries-Europe, Inc.  (Crawley, United Kingdom)
	Northwest Projects Ltd  (Sittingbourne)
	Raytek (UK)  (Milton Keynes)
	Roxspur Measurement & Control Ltd (Platon)  (Tadley)
	Roxspur Measurement & Control Ltd (Platon)  (Sheffield)
	Southern Temperature Sensors Ltd  (Woking)
	T C Ltd  ()
	Tempatron   (Maldon)
	Thermal Detection Ltd  (Stockton-on-Tees, England)
	Thermospeed  (Bolton)
	West Control Solutions (Cal Controls)  (Brighton)