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The Sender Unit, integrated in the gearbox, transfers 
the number of revolutions of a gearwheel into electri-
cal pulses.
The revolutions are captured by means of a Hall IC.
The pulses supplied by the Hall IC are used by ta-
chographs and on-board computers for capturing 
the distance covered and the road speed.
When using the integrated sender unit the speedo-
meter shaft connection is no longer necessary.

2159-20 is designed for heavy-duty purposes!

Features

• Touch-sensitive measuring procedure (Hall IC)
• Integrated in the gearbox
• Static measuring (zero-speed recognition)
• Double pulse (inverted)
• Can be sealed
• Can be directly connected to the vehicle 

 

  electric system

• Recognition of sense of rotation (2 sensors)
• 7 different lenghts to comply with the 

 

  different types of gearboxes

Applications

• For tachographs/EC tachographs KTCO 1318,
  FTCO 1319 and MTCO 1390 NEC
• Generally for devices requiring an electrical pulse
  (double pulse, inverted) for road speed and/or

  distance measuring.

www.vdo.com

Sender Unit

2159-20 (stat.)

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