The GRANIT 13412091 refractometer is a high-precision tool designed for quick and reliable measurement of AdBlue concentration (30-35%), battery acid density (1.10-1.40 kg/L), and antifreeze freezing points for both ethylene glycol and propylene glycol (-50 to 0 °C). Featuring automatic temperature compensation (ATC), this essential workshop instrument ensures accurate readings for maintaining agricultural, construction, and industrial machinery. It comes complete with a pipette, screwdriver, and cleaning cloth.