- ACCUSTEST – TRANSMITTERS
- AI-TEK
- AMETEK – CALIBRATORS
- AMOT
- ASTM – THERMOMETERS
- BAROID – METERS
- BAROID – METERS
- BARTON – INSTRUMENTATION
- BONNETI
- BOURDON GAUGE
- BRISTOL – CHART DRIVES
- BROOKS – METERS
- DRUCK – CALIBRATORS
- DACCSYE-TRU TECHNOLOGY
- DELTA X-WELL SOUNDER, DYNAMOMETER
- DETRONICS – TRANSMITTERS
- EG&G CHANDLER – dead weight testers, dew point test, orifice test, critical flow proover
- fenwal - controls
- FIREYE INC.
- FLEETGUARD FILTERS
- FISCHER ROTAMETERS
- FISHER/ROSEMOUNT – TRANSMIT.
- FLAREGAS – PANEL TIMER
- FLUKE – INSTRUMENTS, PROBE
- FOXBORO – PRESSURE/TEMP. RECORDER, TRANSMIT
- GO SWITCH
- HONEYWELL MEASUREX
- IN-SITH – OXYGEN ANALYZER
- INVALCO – DETECTORS
- ITT BARTON – RECORDERS
- K-TEK - LEVEL GAUGES
- KURZ - FLOW
- LINC – LEVEL CONTROLS
- LUFKIN – TAPES
- MAGNETROL – LEVEL INSTRUMENT
- MARSH – INSTRUMENTS
- MARTIN DECKER – WEIGHT
- MCDANIEL – CONTROLS
- MERCOID – CONTROLS
- MERIAM – INSTRUMENTS
- MESCON – TRANSMITTERS
- METRIX
- MIKRON – THERMOMETERS
- MULTIN – RELAYS
- MURPHY – SWITCHES
- NEO-DYNE – PRESSURE SWITCH
- NORGREN
- NOVATECH – CONTROLS
- OILGEAR – LIQUID METERS
- OMEGA – FLOWMETER
- ORANGE RESEARCH –
- OILGEAR – LIQUID METERS
- OMEGA – FLOWMETER
- ORANGE RESEARCH – PRESSURE GUAGES
- PERMACAL – GAUGES
- POTTER BRUMFIELD – RELAYS
- RAYCHEM/TRACETEK – LEAK dETECTORS
- REXWORKS
- ROBERT SHAW – VIBRA
- ROCKWELL AUTOMATION
- RONAN – CALIBRATORS
- ROSEMOUNT – TRANSMITTERS, ANALYZER
- QEL-DEDSCO – GAS DETECTORS
- SIGNET – FLOW SENSORS
- SMART – TRANSMITTERS
- T.D. WILLIAMSON – INDICATORS
- TEKTRONICS – OSCILLISCOPE
- TELEDYNE
- TEL-TRU INSTRUMENTS
- THERMOPROBE
- VRC – TRANSMITTER
- WILKERSON – SIGNAL CONDITIONS
- YOKAGAWA – INSTRUMENTS
- ZIRTEK – MULTI-PROBES