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659 Liquid Filled Pressure Gauge

659 Pressure GaugeWhen safety is your top priority, the new Model 659 Series SOLFRUNT Gauge is the choice. The Model 659 pressure gauge provides users with a solid-front case design and pressure-relieving back design in all stainless steel construction.  This gauge is NEMA 4X / IP67 compliant for increased durability.

These pressure gauges are available in both 2½" or 4" sizes, in panel mount and low mount configurations. The liquid fill minimizes the effect of these severe environments, protects the gauge internals, and provides continuous lubrication on the mechanism, all adding up to extended service life. Liquid filling also provides greater protection of the gauge internals from corrosive atmospheres.

The Model 659 SOLFRUNT is ideal for applications in chemical and petrochemical processing, offshore equipment, exploration, petroleum storage, and many other demanding applications. The 659 is available dry or liquid-filled with glycerin, mineral oil, or silicone DC-200.

Gauge size: 2½" (63 mm) or 4" (100 mm)

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Accuracy:  ±(1.6 or 1.0 % FS)   

Size:  2½" or 4"

Wetted Parts:  316 Stainless Steel
Ranges:  From 30"Hg through 23 000 psi
Weather Protection  NEMA 4X / IP67
  • Documentation +

  • Options +

    • Liquid Filling
      • Order Code: LG, LS, or LM - Extend the life of your pressure gauges. Liquid filled pressure gauges are generally recommended over dry gauges due to performance and durability. When USG’s liquid filled gauges are filled with Glycerin (LG), Silicone (LS), or Mineral Oil (LM) you’re helping to prevent gauge failure commonly caused by excessive vibration or pulsation. Glycerin is the most common fill fluid and is typically used for room-temperature applications. Silicone is used for more extreme temperature applications. Mineral Oil can also be used for higher temperature ranges.
    • NIST Calibration Certificate
      • Order Code: /C - NIST (National Institute of Standards and Technology) Certification of Calibration states that the pressure gauge was tested at multiple test points and is within its stated tolerance of accuracy. Gauge is shipped with a sticker on the side of the gauge noting the certification number and date, and NIST certificate.
    • Dual Scale Dials
      • US Gauge offers most pressure ranges in dual scale, such as psi & kPa, psi & BAR, psi & kg/cm2, or single scale metric such as kPa, kg/cm2, or BAR. Dual scale dials are available at no extra charge. Please reference our data sheet or email customer service at with any questions.