VDO Reed Switch Fuel Sender - 900 MMReed Switch Fuel Sender 900 MM Most aftermarket fuel senders use a rotating float arm and resistance cards to measure the amount of fuel in a tank which can lead to erratic pointer movements. This revolutionary design comes with many benefits! This is ideal for applications where a conventional swing arm will not fit due to clearance issues. The tubular design acts as a dampener to prevent the gauge pointer from moving due to fuel slosh. The floatless