| We a professional manufacturer of optical instruments, our main products are: refractometer, Gem Instrument and fiberscopes in CHINA. The Digital refractometer with a digital readout and LCD display will eliminate uncertainties and is more convenient to use. Just about 0.3ml-0.5ml sample was needed. The result will be showed in the display! With smart and beautiful shape, our Pocket digital refractoemeter will be a good instrument in your work! | 
