3 in 1 Automotive Battery Antifreeze Refractometer, Charge Test Cooling System Coolant Freezing Point (3 Scales Measurements)

Versatile Testing: This 3-in-1 Refractometer measures freezing points and concentrations of ethylene or propylene glycol-based cooling systems. It also measures the specific gravity of battery fluid. Wide Applications: Monitor battery charge reliability and health, check car cooling system freezing points, and ensure proper coolant functionality to prevent issues like rust, freezing, poor charging, and poor cooling. User-Friendly Design: With auto temperature compensation (ATC), simple calibration, and a comfortable non-slip rubberized grip, it offers convenience and accurate measurements. Clear and Accurate Results: The adjustable focus, defined scale, and large easy-to-read measurements provide clarity and precise readings. Approved by strict quality and safety standards. Specifications: Measures ethylene glycol (-600°C), propylene glycol (-500°C), and battery fluids' specific gravity (1.100-1.400 kg/l). Accurate within ±5°C for glycol measurements and ±0.01 kg/l for specific gravity.