Yisitong Electronic Instruments Factory is a hi-tech corporation specia lized in developing, making and s elling diversified photoelectric instruments with over 10 years of industrial application. Main products consist of: laser diameter measuring instrument series, reflection meter, gloss gauge, photic device, coating thickne ss gauge, ultrasonic thickness gauge and integrating sphere, and provide online production, quality inspecti on and test equipments for such industries as wires, coating and electric light source.