... anti-interference. Our company supply the JB-750 Metal elements optical emission quantometer to the guests all over ... various industries, such as iron and steel, non-ferrous metal, metallurgy, machinery, chemical equipment, quality inspection system ... 4mmSpectrometer:Analysis band range: 160 ~ 650nmMachine engraved concave grating: Curvature radius of 750mmDepicts the density: 1667/mmIncidence angle: ...