The Draper Expert AdBlue Refractometer Kit is a precision measuring instrument designed for testing urea concentration in AdBlue diesel exhaust fluid and antifreeze strength. This dual-purpose refractometer provides accurate readings essential for maintaining diesel exhaust systems and cooling systems in commercial vehicles and plant machinery. Featuring an Automatic Temperature Corrected (ATC) prism, this refractometer delivers reliable measurements regardless of ambient temperature variations. The focusable eyepiece allows clear reading of the measurement scale, whilst the urea measuring range of 0 to 40% and antifreeze range of 0 to -50°C covers the full operational spectrum for both AdBlue and standard ethylene glycol or propylene glycol antifreeze solutions. Ideal for workshops, fleet maintenance operations and mobile mechanics, this complete kit arrives ready to use with all necessary accessories. The comprehensive package includes a calibration screwdriver and calibration fluid