Precision Capacitive Sensors

Capacitance Displacement Sensors
  • High performance capacitive sensors
  • For use against all metallic and non-metallic surfaces, such as steel, aluminium, plastics, glass and ceramics
  • Stainless steel construction
  • High accuracy and thermal stability
  • May be used at operating temperatures up to 200°C
  • High temperature versions available for use up to 850°C
  • 2 metre flexible cable supplied as standard
  • Cable lengths up to 5 metres supplied to special order
  • Custom design service available

DESCRIPTION
CDT capacitive sensors have been developed in conjunction with FT1000 series electronics to produce a precision measurement system, which can be applied to a wide range of laboratory and industrial applications.

The sensors are fully guarded to optimise system output and are completely immune to both cable vibration and temperature effects.

 

TYPICAL APPLICATIONS

  • Static & Dynamic Displacement Measurement
  • Component Position & Thickness Measurement
  • Axial & Radial Shaft Runout Measurement
  • Rotor Eccentricity & Orbit Tracing
  • Surface Profile Measurement
  • Vibration Monitoring
  • Edge Detection

SENSOR GEOMETRY

Sensor Part Number
Body Length L (mm)
Body Diameter ØB (mm)
Electrode Diameter ØE (mm)
Typical Linear Range (mm)
Max Working Range (mm)
Max Working Temp (°C)
CDT100-02 20 8.0 2.0 2.0 5.0 200
CDT100-04 25 15.0 4.0 4.0 10.0 200
CDT100-08 30 30.0 8.0 8.0 20.0 200

Stated measurement ranges are against metallic surfaces and may be reduced when applied to non-metallic materials. Figures quoted are for CDT sensors calibrated with FT1000 series electronics. Sensors should be grounded to earth during normal operation. Larger sensors are available to special order.
 
GENERAL Sensor Type CDT series (Low temp)
  Connector Type Microdot plug
  Cable Type Low noise 100% screened coaxial flexible
  Cable Length 2 metres standard, 5 metres maximum
  Cable Diameter 2mm
 
HIGH TEMPERATURE SENSORS
GENERAL Sensor Type CDT-HT series (High temp)
  Connector Type Lemo Triaxial Plug
  Cable Type Low noise 100% screened triaxial mineral insulated
  Cable Length 2 metres standard, 5 metres maximum
  Cable Diameter 3.5mm
     
High temperature CDT-HT sensors are usually application specific and are custom designed accordingly. Minimum electrode size is typically Ø5mm, with larger versions available up to Ø30mm.
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