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Measuring and Controlling Devices, NEC (206)

Alcohol Breath Detectors Manufacturers (6)

Alidades, Surveying (10)

Cable Testing Machines (2)

Chronometers, Electronic (1)

Compasses Manufacturers (1)

Dynamometer Instruments (1)

Fare Registers, for Street Cars, Buses, Etc. (1)

Fatigue Testing Machines, Industrial: Mechanical (3)

Fire Detector Systems, Non-Electric (2)

Fuel System Instruments, Aircraft (1)

Gas Detectors (20)

Gauges, Motor Vehicle: Oil Pressure, Water Temperature (3)

Geiger Counters (1)

Geophysical and Meteorological Testing Equipment (2)

Geophysical or Meteorological Electronic Equipment (19)

Hardness Testing Equipment (2)

Hydrometers Manufacturers (4)

Instrument Board Gauges, Automotive: Computerized (3)

Instrumentation for Reactor Controls, Auxiliary (8)

Level Gauges, Radiation Type (2)

Levels and Tapes, Surveying (2)

Liquid Leak Detection Equipment (1)

Map Plotting Instruments (1)

Measuring/Controlling Devices (Unclassified) Manufacturers (8)

Medical Diagnostic Systems, Nuclear (7)

Meteorologic Tracking Systems (2)

Nuclear Radiation and Testing Apparatus (14)

Physical Property Testing Equipment (9)

Plotting Instruments, Drafting and Map Reading (1)

Polygraph Devices (1)

Pressure Transducers (1)

Stress, Strain, and Flaw Detecting/Measuring Equipment (4)

Surveying Instruments Manufacturers (19)

Temperature Sensors, Except Industrial Process and Aircraft (9)

Tensile Strength Testing Equipment (1)

Testing Equipment: Abrasion, Shearing Strength, Etc. (6)

Thermocouples (2)

Thermometers, Liquid-In-Glass and Bimetal Type (2)

Toll Booths, Automatic (1)

Torsion Testing Equipment (2)

Transits, Surveyors' (1)

Turnstiles Manufacturers (1)

Ultrasonic Testing Equipment (8)

Vibration Meters, Analyzers, and Calibrators (9)

Wind Direction Indicators (2)