Product Description

The Steam-Trac STB-3000 Bi-Color Ported Gauge must be used with a red/green filter illuminator. The gauge chamber is constructed with opposing ports at an angle so that red light will pass unimpeded through the gauge in the steam phase. When water is present, refraction will allow green light, only, to pass through. The result is a clear visual indication of water level.

All connections and materials fully comply with ASME requirements, and the gauge may be used as a Direct Reading Sight Glass for compliance to ASME PG-60. Since water appears completely different than steam, it is not necessary to have overlapping sections. Multiple section gauges will have a continuous chamber constructed of a single piece of bar.

An Illuminator is required for this gauge to work properly.

Product Features

  • For 3000 PSI Working Steam Pressure (WSP)
  • Fully compliant with ASME as a Direct Reading Water Gauge
  • Continuous one-piece chamber
  • Innovative LED Illuminator design
  • Custom built per specifications
  • Bolts are nickel plated
  • High temperature coating

Product Specifications


  • Chamber: 304 Stainless Steel
  • Gasket: Spiral Wound Grafoil
  • Shield: Ruby HQ Mica
  • Glass: Tempered Aluminosilicate
  • Cover: Carbon Steel
  • Bolts: Nickel Plated



Compatible Products


Document Title Category
200-00 Level-Trac & Steam-Trac Brochure
Brochures, Product Line Brochure
200-06 STB-3000 Steam-Trac Cut Sheet
Data Sheet
200-07 STBI-3000A Illuminator Cut Sheet
Data Sheet
210-00 Direct Reading Water Gauge Selection Guide
Technical Documents
210-01 Suggested Minimum Center/Center Data
Technical Documents
230-06 STB-3000 IOM
230-06 STB-3000 IOM Espanol
230-08 STBI-3000A Bi-Color Illuminator & Viewing Hood IOM
230-11 STB-3000 Repair Kit
SV-3000 Catalog Sheet
Data Sheet
QTS Water Steam Table
STB-3000 Specifying Guide
Visible Range Placement – Steam-Trac
Technical Documents
Viewing Angle Specification
Data Sheet, Steam-Trac
Steam-Trac and Level-Trac RFQ Form