Analog Refractometer High Precision Alog Manual Range 0 Degrees to -48 Degrees C Ethylene Glycol 0 Degrees to -48 Degrees C Propylene Glycol 0-61 Propylene Glycol 0-70 Ethylene Glycol 1.100-1.400 Electrolyte Automatic Temperature Compensation Yes Accuracy 0.55 Degrees C Resolution 0.55 Degrees C Function Battery Electrolyte Specific Gravity And Charge Level Concentration Of Ethylene Glycol And Propylene Glycol Freeze Points Of Ethylene Glycol And Propylene Glycol