B Euro White 4 Speedometer - 55MPH Mechanical B br 4 - Hole Size 3 375 85mm br br Electronic speedometers operate by capturing pulses produced by a sensor the pulses are then electronically converted to a speed reading very much like a tachometer converts ignition pulses to RPM br br Pitot tube type speedometers operate by pressure from the water being forced into the pitot tube This pressure is then transmitted through flexible tubing to the bourdon tube movement inside the speedometer head where it is converted into a speed reading by the movement mechanism br br B Benefits B br UL LI Wide range of speeds br LI Rugged Reliable construction LI UL --- cis2 mmxtmJVt --- br
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