Onyx PSS Series Isolator Ring

Technical Specifications of the Onyx Isolator Ring – PSS

The Onyx Isolator Ring provides a simple, accurate method to measure pressure of slurries and corrosive fluids. The PSS series is compatible with threaded pipe connections.

Onyx ultra-deep vacuum filling insures the highest accuracy in the industry. The patented “Module Seal” – standard on all Onyx Isolator Rings – allows instruments to be or replaced or calibrated without interrupting the process.


  • Low-Cost
  • Superior accuracy compared to diaphragm seals
  • Instruments can be replaced without removing the isolator ring from the pipe
  • Immune to errors caused by ambient temperature fluctuations
  • Integral snubber eliminates gauge fluctuations at no additional cost
  • Silicone oil fill fluid is safe, non-toxic, non-corrosive, and stable from -40°F to +400°F