Surface Roughness Measurement Sensor Technical Data
Non-contact sensor for continuously measuring surface finish
Lasercheck® sensors are designed to perform high speed, accurate, non-contact measurements of surface roughness. A built in visible
laser diode emits a laser beam from the bottom of the gage illuminating the surface beneath it. After striking the surface, the
laser light is reflected and scattered back into the Lasercheck detection system. The overall intensity and distribution of the
reflected and scattered light is measured, digitized by Lasercheck electronics, and then Ra roughness is calculated for the
illuminated area. The Lasercheck Windows display and control software can be used to display the real time Ra values in
graphical and numeric format along with statistical parameters.
Lasercheck has been designed for a nominal height standoff of 26.80 ± 0.254 mm (1.055 ± 0.01 inches) from the measurement surface. Motions and vibrations within that tolerance range are monitored continuously and reflectance and scatter distribution are normalized and corrected during every measurement cycle to ensure accurate results. Surfaces are positioned 26.80 mm (1.055 inches) below the gage allowing non-contact measurements of the surface to be made.
Measurements can be performed by continuous high-speed measurements controlled by Windows software, or fully
automated high speed on-line measurements triggered by external signals and the Windows software. At the end of a
measurement sequence, the user is provided options for performing additional measurements, saving the current
measurements or exiting the measurement sequence. When measurements are saved an ASCII file format can be created for
reading into a variety of spreadsheet and analysis software packages.
Specifications and Features
| Measurement / Detection Method | Angle resolved laser scattering |
| Measurement speed | Single measurement in < 0.5 seconds |
| Measurement range | 1.00 μinch to 80 μinch / 0.012 μm to 2.0 μm |
| Repeatability | ± 3.0% of measured value |
| Spot size (area-measured) | 5 mm X 1 mm |
| Operating Temperature | -10º C to +55º C / 10% to 90% RH |
| Storage Temperature | -40º C to +80º C / 1% to 99% RH |
| Power requirements | 110 VAC, 50 / 60 HZ, 2.0 Amps max |
| Target materials | Steel, Aluminum, other metals, Glass, Rubber, etc. |
| Output Interfaces | RS232, 0-10V, 4-20mA current loop |
| Inputs | Triggers for Start, Stop and Save Measurements |
| Computer Requirements | Available serial port |
This two-page specification brochure shares all of the technical details about the sensor including technology principles overview, performance specifications, electrical and mechanical dimensions. Please note that our data sheets are updated frequently and the latest revisions reside on this website.
Download the Lasercheck® 5872 Data Sheet
Lasercheck® 5872 Users Manauls
This user's manual is a multi-page documents which explain how to operate and install the sensor hardware.
Access the Lasercheck® 5872 Users Manuals
Lasercheck® 5872 CAD Files
This is an Adobe Acrobat file of the CAD drawings for this sensor.
Download the Lasercheck® 5872 Mechanical Drawing 
(pdf 100 KB)