Eddy Current Probes and Drivers

Proximity sensors work on the eddy current principle. A proximity system consists of an eddy current probe, extension cable and driver. A high-frequency RF signal is generated by the driver, sent through the extension and probe cables and radiated from the probe tip. The tip consists of a precision wound copper coil inside a chemical and temperature resistant PEEK case.

  • eddy current probe EPHD80

  •  eddy current probe EP080

  • eddy current driver

  • eddy current driver

  • eddy current driver

The tip is either mounted on a threaded stainless steel rod allowing easy gap adjustment on a bracket via two locking nuts or a flat, low profile mount. The driver demodulates the signal, amplifies and linearises it to provide an output proportional to the probe to target gap and/or vibration of the target.

External overview

The Eddy Current Probe consists of a precision-wound copper coil inside a chemical- and temperature-resistant PEEK tip. This is mounted on a threaded stainless steel rod for easy gap adjustment or a flat, low-profile mount. It is supplied with 1m of integral overbraided coaxial cable. Operates up to 180˚C. Operating gap depends on the tip diameter. Can be used with any driver.

Current output drivers give a 4-20mA output directly proportional to the measured component and allow direct connection to PLCs and other industrial controllers. Can be used with any probe type.

MTN/EP080

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/EP080

MTN/EP200

MTN/EP200Used to measure coarser vibrations.

 

 

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

MTN/EP200

MTN/EP200F

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

 

 

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

MTN/EP340

MTN/EP340Generally used for precision gap measurements.

 

 

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

MTN/EP340

MTN/EP340F

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

 

 

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

MTN/EP480

MTN/EP480Widest gap capability.

 

 

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

MTN/EP480

MTN/EPHD80

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

MTN/ECPD24V

MTN/ECPD24VVoltage output driver suitable for conventional +24VDC power supplies.

 

 

  • Output: 0 – 16V proportional
  • Power: +24VDC
  • Probe Connection: SMC
  • Enclosure: Powder coated die-cast alloy

MTN/ECPD24V

MTN/ECPD

MTN/ECPDVoltage output driver for negative going power supply required to match other manufacturers’ controllers.

 

 

  • Output: 0 – 16V proportional to probe gap
  • Power: -24VDC
  • Probe Connection: SMC
  • Enclosure: Powder coated die-cast alloy

MTN/ECPD-24V

MTN/ECPD/78

MTN/ECPD/78Voltage output driver suitable for conventional +24VDC power supplies. Lower output sensitivity.

 

 

  • Output: 0 – 10V proportional to probe gap
  • Power: -24VDC
  • Probe Connection: SMC
  • Enclosure: Powder coated die-cast alloy

MTN/ECPD60

MTN/ECPD60Current output driver for gap measurements. Range dependent on associated probe, typically 2mm gap for thrust measurements on turbine and pump shafts. Three-wire configuration.

 

  • Output: 4 – 20mA proportional to probe gap
  • Power: -24VDC, three-wire loop-powered
  • Probe Connection: SMC
  • Enclosure: Powder coated die-cast alloy

MTN/ECPD60

MTN/ECPD85

MTN/ECPD85Current output driver for vibration measurements. Range dependent on associated probe, typically 125micron peak-to-peak vibration for turbine and pump shafts. Three-wire configuration.

 

  • Output: 4 – 20mA proportional to vibration
  • Power: +24VDC, three-wire loop-powered
  • Probe Connection: SMC
  • Enclosure: Powder coated die-cast alloy

MTN/ECPD85

MTN/ECPD2-AC

MTN/ECPD2ACCurrent output driver for gap measurements. Range dependent on associated probe, typically 2mm gap for thrust measurements on turbine and pump shafts. Loop-powered.

 

  • Output: 4 – 20mA proportional to probe gap
  • Power: +24VDC, two-wire
  • Probe Connection: SMC
  • Enclosure: Powder coated die-cast alloy

MTN/ECPD-AC

MTN/ECPD2-DC

MTN/ECPD2DCCurrent output driver for vibration measurements. Range dependent on associated probe, typically 125micron peak-to-peak vibration for turbine and pump shafts. Loop-powered.

 

  • Output: 4 – 20mA proportional to vibration
  • Power: +24VDC, two-wire
  • Probe Connection: SMC
  • Enclosure: Powder coated die-cast alloy

MTN/ECPD-DC

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Monitran Product Range

accelerometers

Accelerometers

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

monitoring systems

Monitoring Systems

Monitoring systems that can be used to measure vibration.

enclosures

Enclosures

Switch Enclosures and Connection Enclosures by Monitran.

linear variable differential transformer

LVDT's

LVDT'S are a popular tansducer in industrial applications.

eddy current probes and drivers

ECPD

The latest precision-wound copper coil Proximity Sensors.

accessories

Accessories

Allowing the user access to a vibration sensor for machinery.


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
Penn
HP10 8AD
UK