Rosemount 9935 Level Bypass Chamber

Self-contained chamber for external mounting of process level instrumentation to a vessel, pressure ratings up to ASME B16.5 Class 2500.

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Effective September 1st, 2026 Rosemount has added a 4.9% surcharge for all of their products. The surcharge will appear as a separate line item on the order.

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Product Specs

Features

  • Optimized for Rosemount guided wave radar and non-contacting radar technologies
  • Pressures up to ASME B16.5 Class 2500
  • Designed to ASME B31.3 Process Piping Code
  • Accumulator max pressure:
    • Carbon steel, 95-5558 PSI
    • Stainless steel, 95-5400 PSI
  • Temperature range:
    • Carbon steel chamber: -20 to 850°F (-29 to 455°C)
    • Stainless steel chamber: -260 to 850°F (-162 to 455°)

The Rosemount 9935 level bypass chamber is an externally mounted chamber for installing level instruments on process vessels. It provides a self-contained measurement point that allows instruments to be isolated for maintenance or calibration without interrupting the main process. The chamber is designed for compatibility with Rosemount level transmitters, including the Rosemount 5300 Guided Wave Radar and non-contact radar technologies, and is based on more than 35 years of chamber design and manufacturing experience.

The 9935 chamber is designed to ASME B31.3 Process Piping Code, with ASME B31.1 and other code options available for specific applications. It is suitable for high-pressure and wide-temperature operating conditions and incorporates full-penetration welds and weld neck flanges to improve mechanical integrity and reduce the potential for crevice corrosion. Material options include carbon steel and stainless steel to meet a range of process requirements.