Refractometers and other optical instruments
3844001 Absorptiometers 3844003 Reflectometers 3844005 Refractometers, Abbe and Pulfrich 3844006 Refractometers, interference, Chance and Rayleigh 3844007 Refractometers, Kohlrausch 3844008 Refractometers, immersion 3844009 Refractometers, projection 3844010 Refractometers, pan 3844011 Refractometers, photoelectric 3844012 Refractometers, laboratory 3844013 Refractometers, pocket 3844016 Spectrofluorometers and fluorometers 3844019 Focimeters 3844022 Turbidity meters/nephelometers 3844023 Opacimeters 3844025 Sensitometers 3844026 Kerr cells 3844027 Eye mark recorders 3844028 Photoelasticity test equipment 3844029 Optical choppers 3844031 Black bodies 3844033 Heliographs 3844034 Lens centring equipment 3844039 Laser pointers 3844040 Scribing systems, laser 3844041 Alignment systems, laser 3844042 Plumb bobs, laser 3844043 Range finding equipment, laser 3844044 Motion control and positioning equipment, laser 3844045 Position sensing detectors, laser 3844046 Centring error measuring equipment for optical lenses 3844047 Gyroscopes, laser 3844048 Granulometers, laser 3844049 Tunnelling guidance systems, laser 3844050 Piercing systems, laser 3844051 Measuring systems and equipment, laser 3844052 Profilometers, laser 3844053 Laser sensors, contact free measurement of dimensional parameters 3844054 Scanners, laser, three-dimensional surface inspection 3844055 Analysers, optical fibre preform
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