
Product
Borosilicate Gauge Glass
Borosilicate gauge glass provides excellent optical clarity, thermal-shock resistance, and chemical durability for industrial liquid-level and flow observation.
Technical Specifications
| Product Type | Level Gauge Glass |
|---|---|
| Materials | Borosilicate Glass |
- Gauge glass, glass tubes, round sight glass , and irregular glass are available.
- Standard and custom sizes are available.
- Compatible gaskets and accessories are available upon request.
Level Gauge Glass
Product Description
Borosilicate gauge glass is widely used for direct liquid-level observation and process viewing in boilers, tanks, pressure vessels, pipelines and industrial equipment. Its low thermal expansion, good optical clarity and chemical durability make it more suitable than ordinary soda-lime glass for applications involving heat and controlled temperature changes.
Kunyo supplies borosilicate gauge glass in four principal forms: Reflex Gauge Glass, Transparent Gauge Glass, Circular Sight Glass, Borosilicate Glass Tube and Irregular Shape Glass. Each product form is designed for a different observation method and installation structure.
Reflex gauge glass provides a high-contrast liquid-level indication through precision-moulded prisms. Transparent gauge glass allows direct observation of liquid color, clarity and interface conditions. Circular sight glass provides an observation window for tanks, pipelines and pressure vessels, while borosilicate glass tubes are used in tubular level gauges, flow indicators and other industrial equipment.
Standard sizes and customized products are available. The appropriate glass type, dimensions and thickness should be selected according to the operating temperature, pressure, process medium, sealing method and equipment design.

Key Features and Advantages
Good Thermal Stability
The low thermal expansion of borosilicate glass helps reduce internal stress caused by temperature changes.
Clear Process Observation
Clear glass provides reliable visual observation of liquid levels, flow conditions and internal processes.
Good Chemical Durability
Borosilicate glass offers reliable resistance to water, most acids, oils and many common industrial fluids.
Multiple Product Forms
Available as reflex and transparent gauge glass, circular sight glass and glass tubes for different industrial installations.
Standard and Custom Sizes
Common replacement sizes and customized dimensions can be supplied according to drawings, samples or operating requirements.
Available Product Forms
Borosilicate gauge glass can be manufactured in a variety of forms to meet different installation and observation requirements.
Typical Applications
Borosilicate gauge glass is widely used in:
- Liquid level gauges
- Boiler and tank level indicators
- Sight flow indicators
- Pressure vessels
- Chemical processing equipment
- Petroleum and petrochemical systems
- Water treatment equipment
- Food and beverage processing equipment
- Pharmaceutical equipment
- Pumps, valves, and pipelines
- Lubrication and oil monitoring systems
- Laboratory and analytical equipment
GET IN TOUCH
KUNYO Industrial Components Co.,Ltd.
Send us your product specifications, dimensions or drawings. Our team will review your requirements and respond within 24 hours.
PHONE
ADDRESS
No. 555 Longxing Road, High-Tech Zone, Hengshui City, Hebei Province, China 053000
Inquire About: Borosilicate Sight Glass
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