Surface Roughness Tester offers remote operation up to 1 m.

Press Release Summary:

Featuring 2-piece design, Model SR100 measures roughness of large components with gauge range of 0.008 in. and accuracy of 5% of reading plus 4 µin. Bottom half of unit travels across measurement surface and sends electrical signal to handheld upper half, which digitizes signal from sensor and sends it to microprocessor where it calculates parameters using standardized algorithms. In addition to measuring Ra and Rz, portable tester also measures advanced Rp, Rv, and Rt parameters.

Original Press Release:

Starrett Introduces Portable Surface Roughness Tester

SR100 Measures Roughness of Large Components, Structures and Product Production

ATHOL, MASS., - The L.S. Starrett Company, a global manufacturer of precision tools and metrology equipment and other tools, today 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% of reading plus 4µin. 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.

For more details and information about the Starrett's SR 100 Surface Roughness Tester, please contact The L.S. Starrett Company at 978-249-3551 or visit

About The L.S. Starrett Company

Founded in 1880, The L.S. Starrett Company manufactures and markets precision measurement tools, metrology equipment, granite-based engineered solutions, band saw blades, power tool accessories, jobsite and shop tools. Long known as "the world's greatest toolmaker," Starrett continues to set the standard of excellence through practical innovation, exceptional quality and unmatched precision.

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