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LVDT linear/angular position sensor

Electricfil An LVDT (linear variable differential transformer) delivers a signal proportional to the linear position (displacement) of a magnet fi xed to a moving part. A proprietary ASIC is used to condition the signal.

The complete sensor can be located outside the housing of the part in a less severe environment, providing noncontact measurement of displacement through metal walls. For extremely high temperatures up to 180°C, the sensing component can be located inside the housing with the electronics outside. The same sensor can be used to measure small angular displacements.

Electricfil solution - ready technologies

Characteristics

  • Stroke up to 100 mm and angles up to 20°
  • Temperatures up to 180°C
  • Typical accuracy: ± 2%
  • Response time: 10 ms
  • Airgap up to 4.5 mm
  • Size: stroke length + 30 mm
  • Integrated diagnostics
  • Optional redundancy
  • Non-contact sensing
  • Through-wall detection for non-magnetic materials
  • Integrated or remote electronics
  • Low sensitivity to external magnetic fields
  • Interface: 3-wire, analog and PWM output

Electricfil knowhow

  • Integration in sensor clusters or mechatronic modules
  • Wide range of packages and interfaces
  • Fully programmable sensors
  • Proven core technology including ASIC
  • PWM or analog mode
  • Same sensor design for linear or angular measurements
  • Combination of several LVDT linear and/or angular sensors in a single module
  • Patented design
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