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Standard Industrial Sight Flow Indicator (View-Through), Threaded Mount

The most common style of flow indicator for industrial application allows visual observation of process flow through a pair of sight glasses mounted on a casted metal body.

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Standard Inline Flow-Indicator Sight Glass with Threaded Connection

This L.J. Star product carries Canadian Registration Number (CRN) registration.

All standard threaded models in the L.J. Star Incorporated line of sight flow indicators carry full ANSI rating and are available in several applications- specific configurations. ANSI designed for 150# or 300# service, threaded units are available in sizes from 1/2" to 2".


  • Plain Style Ð installed in any position
  • Drip Tube Style Ð well suited for vertical lines with downward flow direction.
  • Flapper Style Ð monitoring either horizontal or vertical lines with upward
  • Rotator Style Ð may be installed in any position to indicate flow in any direction.
  • Full ANSI Class Rating
  • Standard


  • 316 Stainless Steel; Carbon Steel
  • Standard gasket materials
  • Neoprene; Gylon¨
  • Tempered borosilicate glass
  • Investment cast surface finish


Full View Industrial Sight Flow Indicator (360¡ View), Flanged Mount

Use where close observation of process fluid characteristics is desired.

  • Mounting: Flange connection
  • 150 psi ANSI size
  • Up to 500º F.
  • 70 to 150 psi (depending on size)
  • Indicator: Drip or ball
  • Sizes: 1/2 to 4 inches
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At Liquidyne, we prioritize our commitment to quality and consistency. In 2017 we achieved ISO 9001:2015 Quality Management System certification to ensure we can repeatedly deliver consistently high-quality products and solutions. Being ISO 9001:2015 QMS Certified by Orion Registrar, Inc, together with our USP Class VI Testing, ASME Bioprocessing Equipment (BPE), and EHEDG certification guarantee, we have the methodologies to assure quality. We will quickly and accurately rectify any issues if any of our products are ever in non-conformance.

img ‰ files/ISO_9001_Quality_Management_System_Certified.png ¶ url ‰ iso-certificate ¶ cta ‰ View Certificate ¶ txt ‰ At Liquidyne, we prioritize our commitment to quality and consistency. In 2017 we achieved ISO 9001:2015 Quality Management System certification to ensure we can repeatedly deliver consistently high-quality products and solutions. Being ISO 9001:2015 QMS Certified by Orion Registrar, Inc, together with our USP Class VI Testing, ASME Bioprocessing Equipment (BPE), and EHEDG certification guarantee, we have the methodologies to assure quality. We will quickly and accurately rectify any issues if any of our products are ever in non-conformance. ¶

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