CALIX XL - laser thickness measurement system

CALIX series is the first family of LAP sensors for differential thickness measurement in one housing. They replace measuring frames, that need time-consuming recalibration and temperature control due to their temperature characteristics. The alignment of measuring beams is optimised during production at LAP. CALIX sensors don‘t need complicated adjustments of opposing sensors in the measurement frame. Errors related to alignment won‘t occur. 

For wide material, measuring tracks in the middle of a roller table or for large movement ranges during traversing measurement LAP off ers CALIX XL. The measuring depth of more than 1 meter allows for enough movement in most applications, that may be realized without a stationary, massive O-frame.

LAP also designs rail constructions for your application, as well automated ones for traversing measurements as ones with manual handling for moving them out of the transport way and back in for measuring.

Please find here more informations regarding CALIX sensors.

Application Movie

Two traversing CALIX XL laser systems measure the thickness of strip.

Customer: Haynes International, Kokomo (IN), USA



  • Repeatability from ± 0,5 μm
  • Measuring frequency: 4 kHz
  • Measuring range: 30 mm
  • Independent of material and surface
  • Temperature-stable
  • Low operating and maintenance costs
  • Protection class IP 64
  • Laser class 2

Technical Details

Measuring Range (a)30 mm
Throat height (b)200 mm
Throat Depth (c)1300 mm
Measuring Depth (d)1020 mm
Resolution0,5 μm
Repeatability*± 0,5 μm
Linearity*± 2,0 μm
Measuring frequencymax. 4 kHz
Laser power**max. 1 mW
Laser class2
Laser type, wavelengthDiode, 670 nm (red)
Beam divergence1,2 mrad
Signal processing80 MHz DSP
InterfacesRS 485, Ethernet / UDP via
external / internal gateway
Power supply24 VDC, max. 500 mA
Protection classIP 64
Dimensions (HxWxD)800 x 300 x 1645 mm
Weightaprox. 230 kg
Ambient conditions0 - 40 °C, 35 - 85 % rel. humidity, non-condensing


* Test conditions: 20° C, matt white, averaging time 50 ms, 2σ
** more power possible


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