Eddy Current Probes

Monitran eddy current probes are resistant to contamination from oil, dirt, dust and water and are used on a wide range of applications including:

  • Pumps
  • Turbines
  • DC gap machine tools
  • Gauges
  • Plain metal bearings
  • Centrifuges

As standard, each eddy current probe in our range will be supplied with 1 metre of integral cable; coaxial, ETFE insulation with an internal copper braid and stainless steel over braid. Extension cables (with the same characteristics) are available up to 8 metres in length.

To find out more about our range of eddy current probes please take a look below:



MTN/EP080The most common probe for high speed pumps with plain metal bearings able to measure small vibration levels and gaps up to 2mm.



  • Probe Diameter: 5mm
  • Operating Gap: 0 - 2mm
  • Body Length: 37mm
  • Thread: M8



MTN/EP200Used to measure coarser vibrations.



  • Probe Diameter: 13mm
  • Operating Gap: 0 - 5mm
  • Body Length: 62mm
  • Thread: M16



MTN/EP200FAs MTN/EP200 but in low-profile mount.



  • Probe Diameter: 13mm
  • Operating Gap: 0 - 5mm
  • Mount: Flat, three-point mounting



MTN/EP340Generally used for precision gap measurements.



  • Probe Diameter: 20mm
  • Operating Gap: 0 - 8.5mm
  • Body Length: 75mm
  • Thread: M20



MTN/EP340FAs MTN/EP340 but in a low-profile mount.



  • Probe Diameter: 13mm
  • Operating Gap: 0 - 8.5mm
  • Mount: Flat, three-point mounting



MTN/EP480Widest gap capability.



  • Probe Diameter: 25mm
  • Operating Gap: 0 - 12mm
  • Body Length: 99mm
  • Thread: M30



MTN/EPHD80This heavy-duty eddy current probe system is designed for the greatest protection from harsh industrial conditions. Rugged IP65 cast aluminum driver housing with integral probe. Stainless steel probe sleeve tailored to exact insertion depth required and the probe can be exchanged without recalibration. Unit can be based on any driver type highlighted in this guide. Particularly suited to thrust or vibration measurements on pumps and turbines.

  • Probe Diameter: 5mm
  • Operating Gap: 0 - 2mm
  • Insertion Length: As required
  • Protection: IP65
  • Entry: M20


Extension Cable

Eddy current probes are supplied with 1m of integral cable which can be extended to 9m (by the addition of up to 8m of extension cable). However, long cables will often give installation problems as they need to be rotated during the gap set-up process; in which case screw-on extension cables are recommended. However, once a system has been manufactured and calibrated with an extended cable it can only be exchanged or renewed with one of equal length and the system will require recalibration.

  • Type: Coaxial, ETFE insultaion, copper braid
  • Overbraid: Stainless steel
  • Maximum Length: 8 metres
  • Connectors: SMC to match probe and driver

call us on +44 (0) 1494 816569

Monitran Product Range



Ideal for use with portable and on-line vibration analysers.

monitoring systems

Monitoring Systems

Monitoring systems that can be used to measure vibration.



Switch Enclosures and Connection Enclosures by Monitran.

linear variable differential transformer


LVDT'S are a popular tansducer in industrial applications.

eddy current probes and drivers


The latest precision-wound copper coil Proximity Sensors.



Allowing the user access to a vibration sensor for machinery.

Monitran logo

Established in 1986, Monitran remains a privately owned company, based near High Wycombe 35 miles west of London.

We manufacture in the United Kingdom and source the majority of our materials and components from selected quality-managed local and national suppliers.

Call Us: +44 (0)1494 816569

Monitor House
33 Hazlemere Road
HP10 8AD