490-00 Major Laboratory Equipment and Accessories
- 06 Barometers and Manometers, Laboratory Type
- 08 Calorimeters and Accessories
- 09 Centrifuges, Desk Top and Free Standing
- 14 Cleaners, Ultrasonic
- 15 Colorimeters, Reflectance
- 16 Colorimeters, Optical
- 19 Density Gradient Equipment: Fractionators, Mixers, Etc.
- 21 Dry Boxes and Glove Boxes
- 24 Dynamometers (Not Automotive - See Class 075)
- 29 Electron Miscroscopy Equipment: Electron Microscopes, Etc.
- 32 Environmental Test Chambers, and Rooms
- 34 Filters, Optical: Ir Interference, Etc.
- 36 Glassware Washing Apparatus
- 39 High-pressure Equipment and Accessories
- 44 Lamps and Other Radiation Sources, Specialized: Cathode, Etc
- 47 Liquid Scintillation Counting Systems
- 51 Lasers, Masers, and Accessories
- 52 Leak Detectors, Vacuum: Helium, Ultrasonic, Etc.
- 53 Magnetic Equipment: Demagnetizers, Electromagnets, Etc.
- 55 Mass Spectrometers and Accessories
- 56 Micromanipulators
- 57 Microscope Accessories: Adapters, Condensers, Filters, Etc.
- 58 Microscopes, All Types (Except Electron & Operating Room)
- 65 Nuclear Equipment and Accessories: Magnetic Shielding, Etc.
- 68 Nuclear Magnetic Resonance (Nmr) Apparatus
- 69 Nuclear Radiation Sources (Not for Medical Use)
- 71 Nuclear Safety Equipment and Supplies: Dosimeters, Etc.
- 72 Optical Laboratory Equipment: Beam Splitters, Choppers, Etc.
- 73 Photometers, Reflectance
- 74 Physics Equipment (Not Otherwise Classified)
- 77 Pumps, Liquid (Laboratory Type): Metering, Peristaltic, Etc.
- 78 Pumps, Vacuum and Pressure/vacuum
- 79 Radioactive Waste Disposal Systems and Accessories
- 80 Sorption Measurement Systems
- 84 Spectrometers: Auger, Electron Engery Loss, Etc.
- 88 Spectroscopes, Direct Reading
- 90 Testing Instruments (Not Otherwise Classified)
- 92 Thermal Analysis, Thermogravimetry
- 94 Vibration Isolation Supports
- 96 X-ray Diffraction and Electron Diffraction Equipment
- 98 Ultrasonic Equipment (For Research): Pulse Generators, Etc.
- 99 Commodities Not Otherwise Classified
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