The Sealey Disc Type AdBlue Tester is a diagnostic tool designed for checking the condition and concentration of AdBlue diesel exhaust fluid. This essential workshop accessory helps ensure optimal Selective Catalytic Reduction (SCR) system performance in modern diesel vehicles. The tester uses a simple yet effective floating disc method to determine AdBlue quality. When a sample is added to the robust plastic body, the number of discs that float indicates the fluid's condition, providing a quick
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