The refractometer measures the freeze point of automotive coolants
(propylene glycol and ethylene glycol) from 32°F to -60°F
It also indicates the specific gravity of battery acid and provides a quick reference
of battery charge condition
It only requires a sample of 2 or 3 drops for fast and accurate readings
Automatic Temperature Compensation provides repeatable results
Comes complete with storage case and a screwdriver and vial of distilled water
used for calibration