SR100 Surface Roughness Tester

March 01, 2011

The L.S. Starrett Co. announced its portable SR100 Surface Roughness Tester, the first in a new line of state-of-the-art material testers. The SR100 determines surface roughness of large components, structures, and is a great tool to audit batch production prior to shipment and production line process control.

Weighing only seven ounces, Starrett's easy to use SR100 features a gauge range of 0.008" and an accuracy of 5 percent of reading plus 4 micro" The innovative SR100 separates into two pieces to measure surface roughness. Using a wide base to ensure stability, the bottom half of the unit travels across the measurement surface and sends an electrical signal to the SR100's upper half. The SR100's hand-held upper has a large LCD display and controls. It digitizes the signal from sensor unit and sends it to a microprocessor where it calculates the parameters using standardized algorithms.

"The SR100 uses an infra-red (IrDA) link between the upper and lower units to provide remote, cable free operation up to a distance of one meter," said John Richardson, Starrett Precision Tool Product Manager. "In addition to measuring basic roughness parameters Ra and Rz, the SR100 also measures advanced Rp, Rv and Rt parameters. It is easy to use, right out of the box and requires little or no operator training."

Other features include a five second cycle time, switch between inch and metric mode without re-measuring, and automatic shut-off after five minutes. The SR100 is user friendly with initial configuration set to minimize problems of use by multiple operators and a simple, reliable calibration routine. The complete SR100 package includes the two-piece assembly, calibration standard, batteries, operation guide and a carrying case.

Related Glossary Terms

  • calibration


    Checking measuring instruments and devices against a master set to ensure that, over time, they have remained dimensionally stable and nominally accurate.

  • process control

    process control

    Method of monitoring a process. Relates to electronic hardware and instrumentation used in automated process control. See in-process gaging, inspection; SPC, statistical process control.