Diameter and ovality measurement instrument

O ur LDS was developed more than 30 years ago to measure fine wires and it is still today unique on the market for its outstanding performances. It is widely used in laboratories (one axis version) as inline applications (two axes version). It has known a continuous evolution to adapt to the most recent technologies. Diffraction technology ensures high accuracy measurement (less than 1µm) and very good repeatability compared to shadow technology commonly used. This optical measurement is wire position and vibration independent. Compact and robust, it includes all electronic and software in one packege for its measurement autonomy.

How to measure ovality ?

To calculate ovality, the diameter must be measured in several directions all around the wire. To avoid wire rotation or sensor rotation around the wire, CERSA developed a specific tool for laboratory application to keep the wire sample straight and taut. A system of cranks and gears pulleys then allows the rotation of this sample in the LDS measuring laser beam. Fitted with this accessory, called WSR, it becomes a complete solution for measuring wire and cable up to 450µm over 360°. After one turn, several datas are displayed on inboard screen or on your comuter : average diameter, min and max diameter, ovality (in µm or in % of the diameter). All these values can then be recorded, printed or used for statistical analysis purpose.

Other tools to support ovality measurement

CERSA also provides several accessoires for laboratory usage. If you want something easier to use than WSR, afoot pedal is available to trig measurement one by one by turning the sample by hands. A label printer is also available to print different sizes of labels with customized templates to be stuck on spools. We suggest to use our CIM Lab PC software dedicated for that laboratory application. Many features help you to connect all devices, display, sort, record and print measurement values. The licence version provides extended features like user login management, customized groups by free fields or statistical analysis of your samples. In other terms, CERSA provides a global solution to enhance laboratory efficency.

The laboratory version of our LDS is worldwide used in many fields of the fine wire industries, and has been for years. These are some examples of what it's used for : steel, copper, bond wire, precious wires, carbon fiber...

Range Ø from 5 to 2000µm (0,2 to 80mils) - Laser Diffraction Sensors


LDS-1-S : 1 axis measurement

The LDS is designed to measure diameters of fine wires, with high accuracy.
It's measurement principle is based on laser diffraction. Position and vibration independency. All static components, no moving parts. No averaging required. It can be used as stand alone device or fitted with accessories for fine wire measurements over 360°. One axis version.

Competitive advantages

.100% static
    .No moving parts
      .Wire vibration independent
        .Compact + robust

WSR : Wire Sample Rotation

Specially made for laboratory applications, the optional WSR completes the LDS to measure fine wire ovality over 360°. Easy to use, it allows a complete analysis of the roundness of the wires and quality of drawing dies. 2 different versions :
- WSR-F : wires < 100µm
- WSR-S : wires between 50 and 450 µm

SWB : Sample Wire Box

SWB allows customers to check periodically the stability of their instruments (quality procedure). Contains a set of 4 standard wires or rods in a box, calibrated in our laboratory. In close relation with international laboratories like NIST (USA) and METAS (Switzerland), these wires and rods can be used as references on your LDS instruments.
Numerous diameters are available : contact us !
Foot pedal

FP : Foot Pedal

By handling manually the wire, the Foot Pedal helps to trig the diameter measurement at different positions of your wire samples. The LDS will compute statistics such as average, min, max.
Label Printer 1

LP : Label Printer

Either connected to the LDS or to the PC using CIM software, it allows to print measurement results and data on labels easy to stick on the spools. Templates are available to customize your labels.

CIM LAB software

CIM Lab 1

CIM LAB Software

Our advanced CIM PROD PC software is a complete production quality management tool for the operators. It comes with our instruments for their parameter settings, to clearly display the production measurements as well as the detected defects and generate real time parameters and records all the measures and events on data base.
The LAB version is specially made for wire sample measurement and data management, classifying samples by customizable fields, recording and generating reports, extracting the data to.csv file.
All are useful features for laboratory applications.


  • Drawing process
  • Periodic dies control
  • Quality control (input)
  • End of production line

Types of wires

  • Steel, copper, stainless wire
  • Gold, silver wire
  • Carbon fiber, saw wire
  • Any precious wire !
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