Borosilicate Tubular Gauge Glass | Transparent Gauge Glass Tube
Product Overview
Borosilicate tubular gauge glass is commonly searched as transparent tubular gauge glass, clear gauge glass tube, tubular gage glass, and glass level gauge tube. It is chosen when buyers need a readable liquid column in a compact external gauge arrangement rather than a flat sight glass disc.
The product is typically used in level gauge assemblies for direct visual confirmation of fluid height and fluid appearance. Tubular gauge glass is also offered in different wall constructions, and heavy-wall versions are used where a stronger tube is required.
Typical Applications
This product is used on equipment that needs simple, direct level reading without electronic instrumentation. Common application areas include tanks, reservoirs, boilers, flowmeters, and process vessels.
Typical use cases include:
- Tanks and reservoirs — direct liquid-level reading.
- Boilers — visible level indication in low-pressure service.
- Flowmeters — visual monitoring of fluid movement.
- Process vessels — observation of liquid level and fluid condition.
Material and Performance
Material Properties
| Property | Value | Source |
|---|---|---|
| Glass type | Borosilicate glass 3.3 | |
| Density | 2.23 g/cm³ | |
| Thermal expansion coefficient | 3.3 × 10⁻⁶/K | |
| Young’s modulus | 63 × 10³ N/mm² | |
| Chemical resistance | High chemical durability | |
| Thermal shock resistance | High thermal shock resistance |
Why Buyers Choose This Product
Borosilicate tubular gauge glass is preferred because it combines clear visibility with good resistance to heat shock and chemical exposure. For many buyers, it is the practical choice when a transparent level indicator is needed in an industrial environment.
Other advantages include:
- clear level visibility in a compact gauge format;
- strong thermal shock resistance;
- broad size and pressure options;
- different end finishes for different installations.
Technical Specifications
Standard Product Data
| Parameter | Value | Source |
|---|---|---|
| Product type | Borosilicate tubular gauge glass | |
| Common aliases | Transparent tubular gauge glass / clear gauge glass tube / tubular gage glass | |
| Material number / family | Borosilicate glass 3.3 | |
| Outer diameter range | 1/2″ OD to 1 1/2″ OD | |
| End finishes | Cut / ground / fire-polished | |
| Pressure ratings | 90 psi to 600 psi, depending on end finish, diameter, and length required | |
| Main application range | Tanks, reservoirs, boilers, flowmeters, process vessels |
Common Size / Pressure Reference
| OD | Typical Use | Pressure Reference | Notes |
|---|---|---|---|
| 1/2″ OD | Standard tubular gauge assemblies | 90–600 psi depending on finish and length | Pressure varies with end finish, diameter, and length. |
| 5/8″ OD | General industrial gauge service | 90–600 psi depending on finish and length | Available in clear or redline-type tubular gauge families. |
| 3/4″ OD | Heavy-duty gauge service | 90–600 psi depending on finish and length | Suitable where a larger tube is required. |
Quality Proof and Evidence
Glass selection, end finish, diameter, and length all affect pressure capability.
- inspection report
- dimensional check sheet
- pressure test record
- customer installation photo
- certificate of conformity
FAQ
What is borosilicate tubular gauge glass used for?
It is used for direct visual liquid-level indication in tanks, reservoirs, boilers, flowmeters, and process vessels.
What material is usually used?
The standard material is borosilicate glass 3.3, which is known for low thermal expansion and high chemical durability.
What sizes are available?
Typical outer diameters range from 1/2″ OD to 1 1/2″ OD.
What pressure range can it handle?
Published tubular gauge glass data lists 90 psi to 600 psi, depending on end finish, diameter, and length required.
What is the temperature range?
The complete gauge system can be specified for elevated service, and one tubular level-gauge datasheet lists up to 250°C for the gauge assembly.
CTA
Request a Quote
Download the Detailed Datasheet
Contact Us for Samples
Send Your Drawing for Custom Sizing
