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W20 Sight Glass Visual Level Indicator

The Series W20 is a one-piece chamber general purpose, rugged flat glass gauge for mid-range pressure temperature applications. Standard construction includes a solid one-piece chamber machined from carbon steel with carbon steel covers, toughened glass, and plated carbon steel bolts and nuts. All metal parts are rustproofed, and a recessed gasket seat prevents movement, insuring leak-free service.

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W20 Sight Glass Visual Level Indicator


  • Available in 9 standard glass sizes
  • Constructed with multiple vision slots for longer size requirements
  • Toughened molded glass is resistant to thermal and mechanical shock and made in accordance with BS 3463, DIN 7081
  • Quality Assurance Testing: All gauges are hydrostatically tested to 1.5 times the rated pressure at 100°F (38°C)
  • Materials conform to NACE MR0175 specifications
  • Replaces industry standard level gauges
  • Female NPT and Union connections available
  • Series W20 Sight Glass and W30 Gauge Valve assemblies available
  • Repair kit available upon request

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