Eddy Current Probes and Drivers

16 January 2025

Eddy current probes are non-contact sensors that use electromagnetic principles to measure distance and detect vibration in conductive materials. They're particularly useful in industrial environments where contact sensors might fail due to contamination.

Manufactured in the UK to ISO 9001:200, Monitran’s eddy current probes are ruggedly built and rigorously tested to withstand harsh conditions.

Key features:

Construction: Coaxial cable with ETFE insulation
Standard cable length: 1 meter
Cable features: Internal copper braid, stainless steel overbraid
Extension cables available up to 8 meters

Applications:

Pumps, turbines, machine tools, gauges, centrifuges, and plain metal bearings. The probes demonstrate high resistance to environmental contaminants like oil, dirt, dust, and water.

Monitran Eddy Current Probes

MTN/EP080 – Most common probe for high-speed pumps with plain metal bearings

MTN/EP200 - Used to measure coarser vibrations

MTN/EP200F - As MTN/EP200 but in low-profile mount

MTN/EP340 - Generally used for precision gap measurements

MTN/EP340F - As MTN/EP340 but in a low-profile mount

MTN/EP480 - Widest gap capability

MTN/EPHD080 - Heavy-duty eddy current probe system designed for for pump and turbine thrust measurements

Eddy Current Drivers

Eddy current drivers work in conjunction with the probes to form complete measurement systems. They process the raw signal from the probe to provide usable output. Monitran offers seven driver models with either voltage or current (4-20mA) outputs. The current output drivers allow direct connection to PLCs and other industrial controllers.

MTN/ECPD-24V: Voltage output driver suitable for conventional +24VDC power supplies.

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

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

MTN/ECPD60: Current output driver for gap measurements. Range dependent on associated probe, typically 2mm gap for thrust measurements on turbine and pump shafts. Three-wire configuration.

MTN/ECPD85: Current output driver for vibration measurements. Range dependent on associated probe, typically 125micron peak-to-peak vibration for turbine and pump shafts. Three-wire configuration.

MTN/ECPD2-AC: Current output driver for gap measurements. Range dependent on associated probe, typically 2mm gap for thrust measurements on turbine and pump shafts. Loop-powered.

MTN/ECPD2-DC: Current output driver for vibration measurements. Range dependent on associated probe, typically 125micron peak-to-peak vibration for turbine and pump shafts. Loop-powered.

To learn more about the range, click here or contact our ADM team on 1300 236 467.