Lumen gemological refractometer GML series is built with monochromatic filter and a built-in LED light source, which is controlled by a momentary on / off switch.
The GML-501 is a compact refractometer with built-in LED illumination for refractiveindex determination, quality control and categorization of gemstones.Specifications:1) Accuracy: 0.01nD2) Illuminati
Product Name: Hand-Held Mini Fiber MicroscopeModel Number: OL, CLPlace of Origin: ChinaSpecifications:1) Optical magnification: 200 x (M200), 400 x (M400)2) Power source: 2 x AAA batteries3) Light sou
Specifications:1) Optical magnification: 200 x (M200), 400 x (M400)2) Power source: 2 x AAA batteries3) Light source: white LED, rated for 100,000 hours4) Weight: 0.28kg5) Size: 190mm/7.48L x 45mm/1.7
Lumen hand-held refractometer AH series works in ambient light with no power sourcenecessary. It can be used in labs, on production lines, in the field or anywhereelse.
Product Name: Hand-Held Refractometer (AH Series)Model Number: RHB, RHC, RHA, RHW, RHSPlace of Origin: ChinaLumen hand-held refractometer AH series works in ambient light with no power sourcenecessary