This model can be used for measuring the freezing point of either propylene or ethylene glycol based cooling systems. It can also be used for checking the strength of electrolyte solution batteries.

Maintaining the proper concentration of your antifreeze can save thousands on engine repairs and maintenance. This tool is used worldwide by trucking and automotive technicians to ensure proper dilution. Focusing eyepiece provides a sharp, easy-to-read scale, which is designed with semi-transparent blue background so you don't have to point the instrument in a certain direction to get your reading. Ambient room lighting provides plenty of illumination. Instrument also gives indication of the charge level in battery acid.

This precision instrument features high-quality optics with ultra smooth focusing.

该型号折射仪被用于测量以乙二醇和丙二醇两者为基的汽车冷却系统水溶液的冰点温度值，它还可以检查蓄电池内电解液的比重及使用状态。冷却系统水溶液冰点为华氏度和摄氏度标定。

该型折射仪内建有自动温度补偿系统,温度补偿范围:0°C～30°C。

测量范围:

乙二醇:-70°C-0°C,-90°F-32°F 
丙三醇: -60°C-0°C,-70°F-32°F 
电池液比重: 1.10-1.40sg

最小刻度值 :
乙二醇: 5°C
丙三醇: 5°C
电池液比重:0.01sg

零点校准：用20°C的蒸馏水在20°C的环境中校准。