Acision RFA-554 Portable Battery Coolant/Glycol Refractometer With ATC

Refractometer
Measures the freezing point of coolants and concentration of Ethylene/Propylene Glycol Refractometer measures the Propylene/Ethylene Glycol freezing point from -50 to 0°C and the Specific Gravity of battery acid from 1.15 to 1.30 and provides a quick reference of battery charge condition. Requires only 2 or 3 drops of solution for fast and accurate readings. Automatic Temperature Compensation provides repeatable measurements on an easy to read scale. Prism and lens with a simple focus adjustment. Includes carrying case and calibration screwdriver.
Key features

High quality pure aluminium body construction
Uses ambient light only which mean rubber
With ATC function (ATC Compensation Range: 10°C~30°C (50°F~86°F))
Durable and built to last long
Package includes: ATC Refractometer, Pipette, A Mini-screw drive, Protective case, Manual, Clean cloths battery or power source is not required
Easy to focus and calibrate
Cushioned with soft & comfortable non-slip