Eddy-Current Sensors

Probes and Ranges

ECD140 & ECD140e Eddy-Current Sensor for CompactRIO:
Probes and Ranges

Probe model numbers are specified by their diameter and body style: i.e. a U8C probe has an 8mm diameter and a "C" body style.

Probe diameter determines the range.
Larger Diameter = Larger Range

See the probe page for mechanical details, important mounting clearances, and temperature limits.

Probes can be ordered as vacuum compatible.

Specifications assume a target at least 3 times the diameter of the probe.

A specific range and resolution will require a particular probe size/model. Range/Resolution may also be affected by the target material.

Custom ranges are also available.

Listed specifications are for standard target materials.

Range mm	Near Gap mm	Probe	Target Type	ECD140 Resolution* µm	ECD140e Resolution* µm
2.00	0.35	U8	nonferrous	0.145	0.4
2.00	0.35	U8	ferrous	0.180	0.4
3.50	0.60	U12	nonferrous	0.240	0.4
3.50	0.60	U12	ferrous	0.390	0.390
* RMS @ 15 kHz. Peak-to-Peak values are approximately 8-10 times higher In high EMI environments, output noise may rise to 0.030 VRMS (0.3% resolution)