YG-2 manifest refraction Refractometer was developed and mass-produced in 1985 and won a bronze medal at the National Invention Exhibition
In 1988, YG-2A manifest refraction Refractometer was improved on the basis of the original YG-2 to improve the assembly efficiency.
YG-3 manifest refraction Refractometer was developed and mass-produced in 1990. In 1991, YG-3 manifest refraction Refractometer was awarded ' remarkable achievements in the construction of socialist four modernizations '. Gold Award for National Invention Fair in 1992 and Second Prize for Science and Technology Progress in Shanxi Province in 1994
A prototype YG-4 Refractometer was made in 1992
FA-6000 Auto Refractometer Prototype Developed in 1999.
The YG-5 Refractometer was improved from the original YG-3 Refractometer in 1996. In 1993, Topcharoen, Thailand, ordered more than 270 YG-5 Refractometer in succession, saving the company in a difficult period. The company has a certain R & D fund, which lays the foundation for subsequent development.
In 2001, FA-6000 automatic refractometer won the national key new product certificate; in 2002, it won the second prize for scientific and technological progress in Shanxi Province; in 2003, it was approved as the ' National Science and Technology Achievements Promotion Plan ' project
FA-6100A and FA-6800 color LCD screen automatic optometrists with technical update were successfully produced in 2006
