Hermetically-Sealed Flag Indicator

The Jerguson Hermetically-Sealed Flag Indicator is purged with inert gas and permanently sealed for use in severe applications.  To achieve an IP-68 certification, this indicator utilizes a permanent epoxy end seal for outstanding long life dependability, unlike valved or silicon seals used by other manufacturers.  It also features a 316SS housing for excellent corrosion resistance.  By employing the dependable Jerguson flag design the hermetically sealed flag indicator offers outstanding visibility and the best reliability on the market.  For offshore, cryogenic, or caustic applications choose the Jerguson Hermetically-Sealed Flag Indicator for a lifetime of dependable level indication. IP-68 Certification

  • Ideal for Offshore, Corrosive Vapors, Cryogenic and other severe environments

  • Permanently sealed!

    • no gaskets or valves; can’t leak or fog

  • ​​​Includes 316SS housing and scale

    • dual scale available

  • WF Series Wide Indicator Available (Polycarbonate Only)

  • Dual Scale Available

  • Flag indicators are purged with inert gas and permanently sealed in:

    • polycarbonate tubing with epoxy-sealed end plugs to 500˚F (260˚C) process temperatures; or

    • glass tubing with 100% fused glass end seals to 1000˚F (538˚C) process temperatures