INDUSTRY COMPONENT

Gauge Glass

Transparent glass tube or window used in liquid level gauges for visual monitoring of fluid levels in industrial tanks and vessels.

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Component Specifications

Definition
A precision-engineered glass component designed for liquid level gauges that provides a clear, durable viewing window to monitor fluid levels in pressurized or non-pressurized industrial systems. It must withstand thermal expansion, chemical exposure, and mechanical stress while maintaining optical clarity and structural integrity.
Working Principle
Operates on the principle of hydrostatic equilibrium where the liquid level inside the gauge glass matches the level in the connected vessel. The transparent glass allows visual observation of the liquid interface, with some designs incorporating colored bands or magnetic indicators for enhanced visibility.
Materials
Borosilicate glass (most common), tempered soda-lime glass, quartz glass for high-temperature applications, or armored glass with protective coatings. Material selection depends on pressure rating, temperature range, and chemical compatibility.
Technical Parameters
  • Thickness 3-25 mm
  • Transparency >90% light transmission
  • Surface Finish Polished to optical standards
  • Pressure Rating Up to 25 MPa
  • Temperature Range -20°C to 400°C
  • Chemical Resistance pH 0-14 compatible
Standards
ISO 3585, DIN 7080, ASME B31.1, EN 1595

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Gauge Glass.

gauge glass sight glass liquid level gauge boiler glass tank level indicator industrial sight window pressure vessel glass level gauge component Gauge Glass in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Liquid Level Gauge

A measurement device that indicates the level of liquid CO₂ within a storage tank.

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Engineering Analysis

Risks & Mitigation
  • Glass fracture under pressure
  • Chemical corrosion reducing visibility
  • Thermal shock cracking
  • Improper installation causing leaks
  • Reduced transparency over time
FMEA Triads
Trigger: Thermal stress from rapid temperature changes
Failure: Glass cracking or shattering
Mitigation: Use borosilicate glass with low thermal expansion coefficient, implement gradual temperature changes, install protective shields
Trigger: Chemical attack from process fluids
Failure: Surface etching and reduced transparency
Mitigation: Select chemically resistant glass grades, apply protective coatings, implement regular cleaning protocols

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5 mm thickness variation, ±1° angular deviation, surface flatness within 0.02 mm
Test Method
Hydrostatic pressure testing per ASME standards, thermal shock testing, chemical resistance verification, optical clarity measurement

Buyer Feedback

★★★★☆ 4.9 / 5.0 (27 reviews)

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Gauge Glass arrived with full certification."

"Great transparency on the Gauge Glass components. Essential for our Machinery and Equipment Manufacturing supply chain."

"The Gauge Glass we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

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Frequently Asked Questions

What is the difference between tubular gauge glass and flat gauge glass?

Tubular gauge glass uses cylindrical glass tubes for direct level reading, while flat gauge glass consists of flat glass plates with gaskets, offering better pressure resistance and safety features.

How often should gauge glass be replaced?

Replacement intervals depend on service conditions: typically 1-3 years for continuous service, or immediately if clouding, cracking, or etching occurs. Regular inspection for scratches and chemical attack is essential.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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