4 in 1 Automotive Antifreeze Refractometer Car Urea Fluid Tester Battery Freezing ATC Detector Handheld Electrolyte Hydrometer

4 in 1 Automotive Antifreeze Refractometer Car Urea Fluid Tester Battery Freezing ATC Detector Handheld Electrolyte Hydrometer Antifreeze freezing point tester is a precision optical instrument for measuring the freezing point of antifreeze. Its basic principle is to apply the total reflection critical angle method to measure the refractive index of the solution, and then calibrate the concentration of the measured liquid and its performance. The measured results can be used to know the freezing point of ethylene glycol and propylene glycol-based antifreeze system and the freezing point of automobile front window glass cleaning fluid; it can also be used to detect the specific gravity of electrolyte in lead-acid battery and the usage status, with temperature compensation device included to ensure accurate measurement at 10℃~30℃ ambient temperature, clear scale and high precision. Specifications: ● Name: Urea concentration meter for car ● Measurement：Car urea/an