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Laser Displacement Sensors from KEYENCE

Laser Displacement Sensor Overview

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Overview

Displacement sensors measure the distance an object moves and they can also be used to measure object height and width. There are 2 types of displacement sensors: Contact types, utilizing a dial gage, differential transformer, etc., and non-contact types, utilizing a magnetic field, laser beam, ultra-sonic wave, etc. This section focuses on non-contact sensors capable of fast response measurement.

Comparison by detaction method
Type Eddy current type Optical type Ultrasonic wave type Laser focus type Contact type
Detactable object Metal Most objects most objects Most objects Solids
Detecting distance Short Normal Long Short Short
Accuracy High High Low High High
Response speed Fast Fast Slow Normal Slow
Environmental resistance Highly durable Normal Normal Normal Highly durable
Detecting point Normal Small Large Small Small

Classification of Displacement Sensors

Detection method Eddy current type Optical type (Triangulation) Light source: semiconductor laser Confocal type
Features
High resolution, high accuracy.
The sensor head is small.
Excellent environmental resistance.
Measures all types of materials.
Small area can be measured from a distance.
Measures transparent (solid) objects with high accuracy.
The measurement point is small.
Multi-purpose,
long range.
Exterior Sensor head Eddy current sensor Optical triangulation sensor Laser focus sensor
Controller
(amplifier unit)		 Eddy current sensor Controller Controller
Model type(Keyence) EX series LK-G, LK, LC, LB series LT series
Item Object Metal Solids, liquids Solids, liquids
(opaque/transparent)
Resolution 0.3μm 0.01μm 0.01μm
Measuring range Between 0 and 10mm Between 9 and 750mm Between 0.16 and 1.22in
Response frequency Maximum 18kHz Maximum 8.3kHz -
Sampling cycle - - 640μm
LK-G Series LK-G Series

Laser Displacement Sensor

 EX-V Series EX-V Series

Inductive Displacement Sensor
6 sensor-heads are available with the newly-developed algorithm and 2 types of optical systems. High-speed, high-accuracy, digital inductive displacement sensors with sub-micron resolution and an ultra-fast 40,000 samples/sec. sampling rate.
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