Reflex Gauge Glass

Reflex Gauge Glass for Industrial Level Indication and Steam Service

Reflex gauge glass is a long strip glass used in level gauge assemblies to show liquid level as a dark column and gas or steam as a silvery column.

It is commonly selected for industrial vessels, boilers, tanks, and process equipment where fast visual reading, standard strip dimensions, and reliable service limits are important.

Download Full Catalogue Request Quote Contact Technical Team

reflex sight glass plate DIN 7081 reflex glass reflex gauge glass plate steam level gauge glass mica design sight glass industrial level gauge glass reflex level indicator glass

How Reflex Gauge Glass Works

Reflex Gauge Glass Overview

Reflex Gauge Glass for Fast Visual Level Reading

Reflex gauge glass is one of the most recognizable strip-glass types used in level gauge assemblies. The reflective groove design creates a dark liquid column and a light or silvery gas column, which makes level reading fast and intuitive in industrial service. The standard material family is borosilicate glass in accordance with DIN 7081, and common sight glass plate dimensions are 34 mm width and 17 mm thickness.

Industrial Level Indication

Reflex gauge glass is used where operators need continuous level indication without auxiliary power. It is a strong fit for tanks, vessels, process equipment, and level gauge bodies where the liquid column must be visible directly through the glass. The strip format supports repeated reading, straightforward maintenance, and a standardized replacement process. It is a practical choice for buyers who want a reliable mechanical level display rather than an electronic instrument.

Learn more →

Steam and Boiler Service

Reflex gauge glass is also used in steam-related service where the temperature and pressure conditions must be considered together. In boiler systems with aqueous media, unprotected sight glass can be affected by high temperature and water treatment chemicals, so the operating limits and material choice matter. Where the application requires a higher thermal margin, mica design may be used in the system design to protect the glass in specific service conditions.

Learn more →

Replacement and OEM Use

Reflex gauge glass is often purchased as a replacement item or as part of an OEM gauge assembly. Buyers typically specify the strip length, width, thickness, pressure range, and mounting detail so the replacement matches the gauge body correctly. This makes reflex glass a common sourcing item for maintenance teams, plant shutdown work, and equipment builders who need repeatable fit and standard dimensions.

Learn more →

Download Full Reflex Gauge Glass Catalogue Request Quote

Read more
Reflex Gauge Glass
Aluminum Silicon Reflex Gauge Glass
Read more
Reflex Gauge Glass
Borosilicate Sight Glass
Read more
Reflex Gauge Glass
Liquid Level Sight Glass
Read more
Reflex Gauge Glass
Reflex Gauge Glass For Boiler

Specification Guide

Reflex Gauge Glass Specification at a Glance

Use this table to compare the most important technical parameters before sending a quotation request. Exact limits depend on the complete gauge design, mounting arrangement, and service condition.

Parameter	Typical Value	Notes
Material	Borosilicate glass in accordance with DIN 7081	Standard material for reflex strip glass in industrial level gauge service.
Glass size	Width 34 mm, thickness 17 mm	Standard strip-glass dimensions used in DIN 7081 level gauge plates.
Viewing principle	Dark liquid column / light gas column	Reflex grooves refract light differently across the liquid and gas zones.
Steam service	Up to 243 °C without mica design	For steam service, higher temperature use requires appropriate design selection.
Steam service with mica design	Up to 300 °C	Mica design is used for specific applications where extra protection is required.
Other media	Up to 300 °C, special cases up to 374 °C	Temperature and pressure must be considered together in the final selection.
Operating pressure	Vacuum to 250 bar	Final limit depends on the complete glass level gauge design.
Applications	Tanks, vessels, chemical industry, petrochemical industry, power plants	Used where continuous level indication is needed without auxiliary power.

Selection Guide

How to Choose the Right Reflex Gauge Glass

The correct choice depends on the medium, temperature, pressure, gauge body size, and whether the application is standard liquid service or steam service. Use the guide below to narrow the specification before requesting a quotation.

Confirm the service fluid

Identify whether the medium is water, steam, oil, chemical liquid, or another process fluid. Steam service and aqueous boiler service usually need a more careful material and temperature check.

Check the temperature range

For steam, the glass can be used up to 243 °C without mica design and up to 300 °C with mica design. For other media, up to 300 °C is possible and special cases can go higher.

Match the gauge body

Confirm the strip width, thickness, visible length, and mounting arrangement so the glass fits the gauge body correctly. Standard strip dimensions are 34 mm by 17 mm.

Decide whether mica design is needed

If the application involves steam, high temperature, or boiler water with treatment chemicals, mica design can help protect the glass in specific service conditions.

Send the quotation data

Provide the drawing, length, quantity, pressure, temperature, and service medium. This helps the supplier match the correct reflex gauge glass quickly and accurately.

Need help choosing between reflex gauge glass and transparent gauge glass?

Reflex gauge glass is usually best when the liquid and gas zones need a strong contrast for fast reading. Transparent gauge glass is usually better when direct viewing of the meniscus is required.

Contact Technical Team

Standards, Certification, and HS Code

Industry Standards and Common HS Code

Buyers often ask about standards, inspection documents, and tariff classification before placing an order. This section gives a practical procurement summary for reflex gauge glass.

DIN 7081

DIN 7081 is the standard reference for borosilicate sight glass plates used in reflex and transparent level gauge applications. It is the most common technical basis for reflex gauge glass sourcing.

Steam Service Note

For steam, the glass can be used up to 243 °C without mica design and up to 300 °C with mica design. For boiler water with additives, the final design must be selected carefully.

Pressure and Temperature

The operating pressure can reach vacuum to 250 bar in suitable glass level gauge designs, but the final limit always depends on the complete system and the selected materials.

Documents

Typical buyer-requested documents include inspection reports, dimensional reports, material certificates, and certificate of conformity. These help support industrial procurement and quality review.

Common HS Code

A common classification reference for reflex gauge glass parts is HS 7020, “Other articles of glass.” Final tariff classification may vary by country and by the exact construction of the item, so confirm with your customs broker or local import authority before shipment.

FAQ

Frequently Asked Questions About Reflex Gauge Glass

What is reflex gauge glass used for?

Reflex gauge glass is used for continuous visual level indication in tanks, vessels, boilers, and process equipment.

How does reflex gauge glass work?

The reflective grooves make the liquid column appear dark and the gas column appear silvery, which makes the level easy to read.

What is the standard size of reflex gauge glass?

The common strip-glass dimensions are 34 mm width and 17 mm thickness.

What is the maximum temperature for steam service?

For steam, reflex gauge glass can be used up to 243 °C, and with mica design up to 300 °C.

What is the maximum pressure?

Operating pressure can reach vacuum to 250 bar depending on the complete gauge design and service condition.

What information do you need for a quote?

Please send the product type, visible length, width, thickness, material, working temperature, working pressure, medium, quantity, and a drawing or sample if available.

Can reflex gauge glass be used in boiler systems?

Yes, but boiler service must be evaluated carefully because high temperature and water treatment chemicals can increase erosion risk.

What is the HS code for reflex gauge glass?

A common classification reference is HS 7020, but the final code depends on the exact product structure and your destination country.

Download Full Reflex Gauge Glass Catalogue

Get the complete product overview, size reference, material options, and application guidance in one file.

Download Catalogue Request Quote

Request a Quote

Send your drawing, visible length, width, thickness, pressure, temperature, medium, and quantity. We will review the requirement and reply with a technical quotation.

Reflex gauge glass plate
DIN 7081 strip glass
Reflex level indicator glass
Mica design reflex glass
Custom replacement reflex glass

Contact Technical Team

Need help matching the correct reflex gauge glass for a tank, vessel, boiler, or replacement project? Contact the technical team for fast product matching.

Contact Technical Team

Reflex Gauge Glass for Industrial Level Indication and Steam Service