The Kärcher 6631439 (6.631-439.0) is a genuine OEM fuel level sensor designed for various Kärcher professional cleaning machines, including B and BR series scrubber-dryers. This essential component ensures precise monitoring of fuel levels, contributing to efficient operation and maintenance. With compact dimensions of 110 mm length, 50 mm width, and 50 mm height, and a weight of 0.05 kg, it is a direct replacement part for maintaining optimal machine performance.