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Current Sensors

Accurate measurement of the actual current depends on the right current sensors. Haug offers you the right sensors in compact design for many applications.

What are current sensors?

A current sensor can detect and measure direct currents (DC currents). Current sensors are "all-current sensitive". This is the main difference to the current transformer, which can only map alternating currents (AC currents). Two measuring principles / effects are typically used here. The Hall effect: Named after Edwin Hall, the discoverer of this phenomenon, the occurrence of an electrical voltage in a current-carrying conductor that is in a stationary (unchanged) magnetic field. And the measurement with magnetic probe (flux gate). This consists of a soft magnetic core and an excitation coil that is used to detect the magnetic flux density. The current sensors are available in the versions open-loop sensor (direct imaging sensor) and closed-loop sensor (compensation sensor).

What current sensors do we have in the portolio?

The focus is on closed-loop sensors with a unipolar supply voltage of +5V and a bipolar supply voltage of ±12V, ±15 and ±24V. Components for printed circuit board and chassis assembly with through-openings or current clamps are available here. The measuring range covers 1.5A to 1700A. A special form of closed-loop sensors are residual current sensors (DI sensors). These detect small residual currents and serve to protect people. This is where the BENVAC sensor product family comes in, which ensures safe disconnection of 5/6mADC and/or 20/30mAAC.

Application areas of current sensors

The areas of application are wherever modern power electronics are used.


  • Converters for drives
  • PV inverter
  • EV charging stations (BENVAC)
  • Battery chargers
  • Wind generators
  • Inverters for welding machines
  • Uninterruptible Power Supplies (UPS)
  • Railway technology
  • Electric vehicles
  • Robotics

Advantages of current sensors

Safe, potential-free measurement of any type of current.


  • Low rise time
  • Very good measurement accuracy in the range of 0.4 - 0.7%
  • Frequency range DC to 200 kHz
  • Very low temperature dependence and practically no long-term drift of the output variable
  • UL508 approval
  • Compact design
  • Higher performance than Hall element sensors