Lumen Optical Instrument Co.,Ltd. is a professional optical instrument factory in mainland china, consisting of senior engineers who have more than 10 years experiences in this industry and skilled workers. Our main products include handheld, digital, gemological refractometers and fiber hand-held microscope. These analytical instruments can be used in many industries like food, beverage, chemical, agriculture, clinical instrumentation for the Healthcare market and fiber manufacturing. We’ve set up firm business relationship with some customers in USA and Western Europe, and then we will continue to dedicate to develop good-quality, ease-of-use, advanced technological instruments. In the future, we want to not only enhance our technology but also expand our market worldwide. We welcome OEM orders!