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VMS-1901 - Inductive sensor

Inductive sensor

About VMS Inductive sensor

Function of the inductive sensor is based on eddy current induction in the moving measured target (blade). The sensor contains a permanent magnet, the field of which is affected by moving metallic measured target. As the target (blade) approaches the sensor, the eddy currents are induced in the blade and measured by a coil located in the sensor. This principle is known since 19th century.


Upon delivery, the sensor could be adjusted to the converter and to the measuring material, thus there is no additional adjustment work necessary for the installation. Only the initial air gap between transducer and measuring target must be adjusted to get the correct signal at the output of the converter. The signal level (amplitude) from sensor strongly depends on air gap between the sensor head and target, speed of the target, temperatures and target material. When recommended conditions are met, the sensor with signal converter provides voltage signal +- 10V.

Parameters

Parameter Value
Cable length 15m
Temperature endurance 225 °C
Head diameter 14 mm
Flange direct

Applications

Due to the contactless measuring principle, small dimensions, a rugged construction and the endurance against aggressive media, this type of sensor is optimally suitable for the use at all kind of turbo machines. Measuring quantities includes:

  • Blade vibration measured from Time of Arrival signals
  • Blade untwisting and angle between leading and trailing edge
  • Blade lean
  • Shaft speed
  • Air gaps between rotating and stationary parts (indirect measurement
    has to be calibrated)
  • Temperature measurement
  • Torsional shaft vibration

Photogallery

About VMS Inductive sensor

Function of the inductive sensor is based on eddy current induction in the moving measured target (blade). The sensor contains a permanent magnet, the field of which is affected by moving metallic measured target. As the target (blade) approaches the sensor, the eddy currents are induced in the blade and measured by a coil located in the sensor. This principle is known since 19th century.


Upon delivery, the sensor could be adjusted to the converter and to the measuring material, thus there is no additional adjustment work necessary for the installation. Only the initial air gap between transducer and measuring target must be adjusted to get the correct signal at the output of the converter. The signal level (amplitude) from sensor strongly depends on air gap between the sensor head and target, speed of the target, temperatures and target material. When recommended conditions are met, the sensor with signal converter provides voltage signal +- 10V.

Applications

Due to the contactless measuring principle, small dimensions, a rugged construction and the endurance against aggressive media, this type of sensor is optimally suitable for the use at all kind of turbo machines. Measuring quantities includes:

  • Blade vibration measured from Time of Arrival signals
  • Blade untwisting and angle between leading and trailing edge
  • Blade lean
  • Shaft speed
  • Air gaps between rotating and stationary parts (indirect measurement
    has to be calibrated)
  • Temperature measurement
  • Torsional shaft vibration

Parameters

Parameter Value
Cable length 15m
Temperature endurance 225 °C
Head diameter 14 mm
Flange direct

Photogallery