Check the listing for details. Digital Coolant Refractometer for Car Ethylene Propylene Glycol Battery Fluid. Color: yellow+white, Condition: New. Listed at 144.99 USD. Digital Coolant Refractometer for Car Ethylene Propylene Glycol Battery Fluid Note: Battery cannot be included during the shipping !!!Introduction:A refractometer is an instrument to measure the concentration of aqueous solution by measuring it’s refractive index. All water based solution can make light bend. The bending of light increases at a rate proportional to the increasing solution concentration. Digital refractometer is a precise optical instrument. it’s characterized by small volume,light weight,graceful in shape and easy to operate. Therefore it can be used by all sides.Features:This model can be used for measuring the freezing point of either ethylene glycol or propylene based cooling systems and cleaner. It can be used for checking the strength of electrolyte solution batteries.Specifications:Cleaner: (0)―(-60)℃ Ethylene Glycol: (0)―(-50)℃ Propylene Glycol: (0)―(-70)℃ Battery: 1.000―1.500sg (battery not included) Cleaner(0)―(-60)℃Ethylene Glycol(0)―(-50)℃Propylene Glycol(0)―(-70)℃Battery1.000―1.500sg (battery not included)