Extech RF40 Coolant and Battery Acid Refractometer with ATC

Automotive coolant refractometer measures the freezing point of coolants plus battery charge condition. Requires only a few drops of solution to use. Measures the freezing point of coolants Measures battery charge condition Provides accurate and repeatable measurements of ethylene glycol and propylene glycol and F on easy to read scale Propylene range -60F 63 to 32F 12 Glycol range -60F 59 to 25F 16 Specific gravity of battery acid 1.15 to 1.30 Automatic temperature compensation Requires only 2 to 3 drops of solution Prism and lens with a simple focus adjustment provides repeatable results Includes calibration screwdriver, calibration solution and case Model RF40 1-year limited warranty