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.

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 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.

Eddy Current Probes and Drivers

Eddy current probes

Our Eddy Current probes are ruggedly built and rigorously tested to withstand harsh conditions, and manufactured in the UK to ISO 9001:200.

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Eddy current drivers

Monitran Eddy Current Probe drivers output either voltage or current (in the 4-20mA range) and there are seven models to choose from. 

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Product spotlight


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Monitran Product Range



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

Monitran 5032

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