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Onyx Isolator Ring - PSQ
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Onyx Isolator Ring - PSQ


The Onyx Isolator Ring PSQ series provides a simple, accurate method to measure the pressure of slurries and corrosive fluids in sanitary applications. Designed for compatibility with Tri-Clover pipe connections, the PSQ allows for quick disconnection from the piping system and ensures accurate alignment and fast installation. The inside diameter precisely matches the sanitary pipe for smooth, unobstructed flow, self-cleaning operation, and minimum turbulence and friction.

Featuring Onyx's ultra-deep vacuum filling, the PSQ series delivers the highest accuracy in the industry. The patented "Module Seal" – standard on all Onyx Isolator Rings – allows instruments to be replaced or calibrated without interrupting the process, making it an ideal solution for industries such as food processing, pet food manufacturing, and more.


  • Absolute immunity to clogging
  • Tri-Clover fittings for quick disconnect from the piping system
  • FDA Silicone oil fill fluid, is safe, non-toxic, non-corrosive, and stable from -40°F to +400°F
  • High displacement design can operate multiple instruments on one ring
  • Ideal for brine, pickling solutions, tomato paste, chilies, mustard, pet food, and chocolate
  • No tools are required to change the pressure instrument
  • Equipped with an integral block valve and module seal


  • Food processing
  • Pet food manufacturing
  • Sanitary applications involving slurries and corrosive fluids
  • Industries requiring quick disconnect and easy maintenance without process interruption


  • Compatible with Tri-Clover pipe connections
  • Inside diameter matches sanitary pipe for smooth, unobstructed flow
  • Self-cleaning operation with minimum turbulence and friction
  • Ultra-deep vacuum filling for the highest accuracy in the industry



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