- Aircraft and motor vehicle measurement equipment (83)
- Accelerometers (13)
- Fuel densitometers, aircraft engine (3)
- Fuel mixture indicators, aircraft engine (2)
- Fuel system instruments, aircraft (9)
- Fuel totalizers, aircraft engine (4)
- Gauges, motor vehicle: oil pressure, water temperature (25)
- Gauging instruments, thickness ultrasonic (23)
- Instrument board gauges, automotive: computerized (25)
- Oil pressure gauges, motor vehicle (7)
- Pressure and vacuum indicators, aircraft engine (11)
- Synchronizers, aircraft engine (2)
- Testers for checking hydraulic controls on aircraft (7)
- Thrust power indicators, aircraft engine (2)
- Water temperature gauges, motor vehicle (4)
- Geophysical and meteorological testing equipment (65)
- Actinometers, meteorological (2)
- Barographs (2)
- Barometers, mercury and aneroid types (4)
- Evaporation meters (1)
- Geophysical or meteorological electronic equipment (37)
- Humidity instruments, except industrial process type (4)
- Hygrometers, except industrial process type (3)
- Magnetometers (5)
- Meteorologic tracking systems (21)
- Meteorological instruments (23)
- Moisture density meters (3)
- Rain gauges (11)
- Seismographs (29)
- Seismometers (2)
- Seismoscopes (1)
- Solarimeters (9)
- Weather tracking equipment (44)
- Wind direction indicators (16)
- Surveying and drafting equipment (39)
- Drafting instruments and machines: t-square, template, etc. (21)
- Levels and tapes, surveying (8)
- Map plotting instruments (9)
- Photogrammetrical instruments (5)
- Plotting instruments, drafting and map reading (18)
- Plumb bobs (2)
- Restitution apparatus, photogrammetrical (1)
- Sextants, surveying (1)
- Surveying instruments and accessories (68)
- Transits, surveyors' (17)
- Physical property testing equipment (122)
- Cable testing machines (14)
- Coal testing apparatus (11)
- Dynamometer instruments (36)
- Fatigue testing machines, industrial: mechanical (16)
- Hardness testing equipment (11)
- Stress, strain, and flaw detecting/measuring equipment (40)
- Tensile strength testing equipment (8)
- Testing equipment: abrasion, shearing strength, etc. (125)
- Torsion testing equipment (3)
- Nuclear radiation and testing apparatus (76)
- Count rate meters, nuclear radiation (6)
- Electrogamma ray loggers (14)
- Geiger counters (4)
- Ion chambers (12)
- Level gauges, radiation type (2)
- Medical diagnostic systems, nuclear (181)
- Nuclear instrument modules (11)
- Personnel dosimetry devices (5)
- Pulse analyzers, nuclear monitoring (3)
- Sample changers, nuclear radiation (1)
- Scalers, nuclear radiation (1)
- Spectrometers, liquid scintillation and nuclear (9)
- Whole body counters, nuclear (5)
- Automatic turnstiles and related apparatus (12)
- Fare registers, for street cars, buses, etc. (11)
- Toll booths, automatic (20)
- Turnstiles, equipped with counting mechanisms (10)
- Thermometers and temperature sensors (82)
- Temperature sensors, except industrial process and aircraft (29)
- Thermocouples (41)
- Thermometers, including digital: clinical (20)
- Thermometers, liquid-in-glass and bimetal type (11)
- Anamometers (2)
- Breathalyzers (39)
- Chronometers, electronic (5)
- Compasses, magnetic: portable type (12)
- Fire detector systems, non-electric (21)
- Gas detectors (102)
- Hydrometers, except industrial process type (6)
- Instrumentation for reactor controls, auxiliary (44)
- Kinematic test and measuring equipment (5)
- Pressure transducers (41)
- Shadowgraphs (2)
- Slide rules (6)
- Thermomagnetic oxygen analyzer (6)
- Turntable indicator testers (1)
- Ultrasonic testing equipment (68)
- Vibration meters, analyzers, and calibrators (99)
- Viscosimeters, except industrial process type (2)
- Polygraph devices (61)
- Liquid leak detection equipment (57)
