Section 18 OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION , MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; M USICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 Optical, photographic, cinematographic measuring, checking, precision, medical o 90 27 Instruments and apparatus for physical or chemical analysis (for example, polari 90 27 10 90 27 10 00 Commodity Code Description 90 27 10 00 00 - Gas or smoke analysis apparatus 90 27 20 00 00 - Chromatographs and electrophoresis instruments 90 27 30 00 00 - Spectrometers, spectrophotometers and spectrographs using optical radiations (UV, visi 90 27 50 00 00 - Other instruments and apparatus using optical radiations (UV, visible, IR) 90 27 80 00 00 - Other instruments and apparatus 90 27 81 00 00 Mass spectrometers 90 27 89 00 00 Other 90 27 90 00 00 - Microtomes; parts and accessories