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New light-intensive confocal controllers measure at high speed, even on dark or rough surfaces

01 August 2022

Micro-Epsilon has expanded its confocalDT range of confocal controllers with two new industrial-grade controllers for distance and thickness measurements on a variety of materials, including dark or rough surfaces.

The confocalDT 2465 single channel controller and the confocalDT 2466 dual-channel controller offer extremely high light intensity at high measuring rates of up to 30kHz.

The confocal measurement principle is designed for high accuracy, non-contact displacement, distance and position measurement against any surface: solid, transparent, polished mirrored surfaces, low reflective matt surfaces and even liquids. If a surface is transparent, a one-sided thickness measurement can be achieved with inbuilt correction for the material refractive index. 

The confocalDT 2465 and confocalDT 2466 controllers are suitable for use with all confocal chromatic sensors from Micro-Epsilon. The controllers are extremely light-intensive, which enables good signal stability and therefore stable measurements, even on dark or rough surfaces. Very fast measurements are possible on shiny targets.

The confocalDT 2465 is designed for one measuring channel. With the confocalDT 2466, two measuring channels can be processed via one controller, which offers a price advantage for multi-channel applications. Measurement acquisition is synchronous and can be carried out while exploiting the full measuring rate for both channels.

Quite often, confocal sensors are selected when laser triangulation or other optical sensors are not accurate or stable enough on the surface being measured. In addition, confocal sensors have an extremely small spot diameter, typically a few microns and measure in the vertical plane, so do not suffer from shadowing of the reflected light. This also enables measurement into small bores and holes.

Almost all industries benefit from this measurement principle as it can be used in both R&D and in-process measurements. In particular, the semiconductor, micro lens, automotive parts, medical, glass and MEMS industries use this sensor technology in many ways.

Multi-peak versions
As with previous models, Multi-Peak controllers are also available for the confocalDT 2465 and 2466. These enable layer thickness measurements of up to five transparent layers. Integration and commissioning (interfaces, ASCII commands, parameter set-up, etc.) are identical to the existing confocalDT 242x controllers, as are the controller dimensions.

Due to a user-friendly web interface, no additional software is required to configure the controller and the sensors. Data output is via Ethernet, EtherCAT, RS422 or analogue. Optional interface modules are also available which enable data output via Profinet or EtherNet/IP. 

For more information on the confocalDT 2465 and 2466 from Micro-Epsilon, please visit or call the Micro-Epsilon sales department on +44 (0)151 355 6070 or email

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