Surface Roughness Tester


The L.S. Starrett Company  announces its portable SR100 Surface Roughness Tester, the first in anew line of state-of-the-art material testers. The SR100 determines surfaceroughness of large components, structures, and is a great tool to auditbatch 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% of reading plus 4µin.  The innovativeSR100 separates into two pieces to measure surface roughness.  Using a widebase to ensure stability, the bottom half of the unit travels across themeasurement surface and sends an electrical signal to the SR100's upperhalf.  The SR100's hand-held upper has a large LCD display and controls. Itdigitizes the signal from sensor unit and sends it to a microprocessor whereit calculates the parameters using standardized algorithms."The SR100 uses an infra-red (IrDA) link between the upper and lower unitsto provide remote, cable free operation up to a distance of one meter," saidJohn Richardson, Starrett Precision Tool Product Manager.  "In addition tomeasuring basic roughness parameters Ra and Rz, the SR100 also measuresadvanced Rp, Rv and Rt parameters. It is easy to use, right out of the boxand requires little or no operator training." Other features include a five second cycle time, switch between inch andmetric mode without re-measuring, and automatic shut-off after five minutes.The SR100 is user friendly with initial configuration set to minimizeproblems of use by multiple operators and a simple, reliable calibrationroutine. The complete SR100 package includes the two-piece assembly,calibration standard, batteries, operation guide and a carrying case.


  • range of 0.008"
  • accuracy of 5% of reading
  • LCD display and controls
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