Optical tester with different functions:Check the battery acid densityChecking the frost protection effect of cooling water (divided into ethylene and propylene)Test the frost protection effect of the windshield washing water on ethanol and alcohol-based basisChecking the urea test AdBlue ® (OFF32)Adjustable eyepieceMeasurement accuracy +/-5%The Brilliant TOOLS Refractometer BT536010 can be used to determine the ethylene glycol and propylene glycol concentration of the anti-freeze agent in your car, your solar system, heat pumps, the freezing point of windscreen washer water or to determine the concentration of urea in AdBlue. The refractometer has an integrated automatic temperature compensation system for maximum precision and ease of use. The device is equipped with a stable metallic casing and a plastic-coated grip.This text is machine translated.