This Draper refractometer will measure antifreeze strength, battery fluid and screenwash strength The Draper 10645 refractometer is designed for measuring anti-freeze strength, battery fluid and screenwash strength. It will work with all new antifreeze technology such as G11, G12 and G13. Its automatic temperature compensation (ATC) ensures accurate and dependable results. Features: Precision refractometer used for measuring anti-freeze strength, battery fluid and screenwash strength Designed to work with the new antifreeze technology such as G11, G12 and G13 Automatic temperature compensation (ATC) ensures accurate and dependable results Supplied with calibration screwdriver, calibration fluid, pipette and a cleaning cloth Specification: Anti-freeze measuring range: 0 to -50°C Battery fluid gravity measuring range: 1.10 - 1.40 Screenwash measuring range: 0 to -40°C