For testing the optimal fluid density of the battery, antifreeze, windscreen washer fluid and Adblue. Including case with fluid pipette and zero set screwdriver.

Measuring range:
- Coolant (antifreeze) -50 degrees to 0 degrees Celsius for propylene, ethylene and G11, G12, G13 coolant from VAG (Audi, Porsche, Seat, Skoda, Volkswagen)
- Adblue 30 to 40% (also Urea and DEF)
- Battery acid charge status 1,100 to 1,400 Kg/l
- Windscreen wiper fluid -40 degrees to 0 degrees SRFI

Works like binoculars: place a drop of fluid with the pipette on the prism. Close the lid. Look through the adjustable binocular opening. Read the value on the clear scale. Always rinse the prism with clean water, because battery acid is very aggressive. This extends the life of this tester. The tester can be easily calibrated by the user himself.