Iris Power Capacitive Air Gap Sensor

Capacitive Air Gap Sensors measure the distance between the rotor and stator in hydroelectric generators to avoid reduced efficiency or damage caused by off-center or out-of-round conditions.

Iris Power Capacitive Air Gap Sensor

  • Capacitive Sensor Technology
  • Output directly proportional to the air gap distance (pole profile)
  • Easy to install and no special calibration needed
  • Low Profile (3 types)
  • High Temperature Stability
  • Immune to magnetic fields, dust, oil, EMI, RFI
  • The air gap sensor comes in a kit with a signal conditioner, junction box and mounting epoxy

Three types available:

CGP-02

  • 135 x 32 x 1.7 mm
  • maximum sensor distance from top of core –  0.5 m (1.6 ft)
  • Recommended range for nominal air gap – 5 mm to 12 mm

CGP-03

  • 230 x 32 x  1.7 mm
  • maximum sensor distance from top of core –  1 m (3.2 ft)
  • Recommended range for nominal air gap – 12 mm to 22 mm

CGP-04

  • 250 x 40 x  1.7 mm
  • maximum sensor distance from top of core –  1 m (3.2 ft)
  • Recommended range for nominal air gap – 22 mm to 47 mm

Online monitoring of the air gap with Iris Power Capacitive Gap Sensors (CGS) can provide important information about the generator condition as it changes, allowing air gap issues to be identified and corrected before an in service failure.

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