PRF-911 Concentric Ring Set

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The PRF-911 Concentric Ring is a low-profile test fixture conceived specifically for use with the Prostat PRS-801 Resistance System and PRS-812 Resistance Meter. It will measure surface resistance per ESD S11.11, and volume resistance per ESD S11.12, and ANSI/ESD SP15.1. Its compact size allows the fixture to be inserted into small flexible containers, such as an ESD protective bag, without having to cut the package.


  • Measures surface resistance per ANSI/ESD STM11.11
  • Measures volume resistance per ANSI/ESD STM11.12
  • Measures surface volume & resistivity per ASTM D-257
  • Incorporates a spring loaded, self-aligning center electrode feature
  • The included Dual Test Bed consists of an insulated test surface for ANSI/ESD STM11.11 surface measurements laminated to a steel test plate for volume measurements.