Handheld Spectrophotometer is suitable for transmission of various solids colour analysis, fluorescent sample and scientific research. - D/8° geometric optic a I structure, conforming to CIE N o. 15, GB/T 3978, GB 2893, GB/T - 18833, iso7724/1, ASTM e1164, d in 5033 teiIT; - Adopt combined LED light source with high life and low power consumption, including UV /excluding UV; - Switch 8mm & 4mm aperture (the flat/ tip measuring aperture can be switched easily, which is suitable for mo re tested sample)