RHA-303 Hand refractometer.

RHA-100	RHA-100 ATC	RHA-200	RHA-200 ATC
RHA-300F	RHA-300F ATC	RHA-303	RHA-303 ATC
RHA-403C	RHA-403C ATC	RHA-404C	RHA-404C ATC
RHA-501	RHA-501 ATC	RHA-503C	RHA-503C ATC

RHA-303

The models have only one unit system: °F and °C. With the indication of the temperature we may know the freezing point of either ethylene glycol or propylene glycol based cooling systems.It can be used for checking the strength of electrolyte solution batteries.

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。冷却系统水溶液冰点为华氏度和摄氏度标定。

测量范围:

乙二醇: -90°F-32°F ,70°C-0°C,
丙三醇: -70°F-32°F ,-60°C-0°C,
最小刻度值 :
乙二醇: 10°F ,5°C
丙三醇: 10°F ,5°C
零点校准：用20°C的蒸馏水在20°C的环境中校准。