METAL FUSED SIGHT GLASSES FOR EXTREME CONDITIONS
Not all sight glasses are created equal – With METAGLAS® you can prevent total failures before they even occur.
Designed for high‒pressure applications involving pressures of several hundred bar and temperatures up to 300 °C.
The Risks of Standard Sight Glasses
That is why conventional sight glasses pose a risk in critical applications
Sudden failure due to unsuitable sight glasses
Under high pressure and temperature conditions, thermally tempered sight glasses can often fail suddenly and without warning—with direct consequences for safety, equipment, and processes.
High maintenance costs and unnecessary downtime
Sight glasses that are difficult to clean or replace significantly increase maintenance requirements and lead to longer downtime and higher operating costs.
No reliable insight into critical processes
If processes are not clearly and consistently visible, deviations often go unnoticed and their causes are difficult to trace, which makes decision-making uncertain.
Increasing requirements due to standards and regulations
Without reliable process monitoring, it becomes difficult to reliably meet the requirements of ISO, FDA, or internal standards—posing potential risks to operations and compliance.
The technical basis of METAGLAS®
METAGLAS® prevents what standard glass cannot
METAGLAS® is not clamped in the traditional way, but is permanently fused to metal. This creates a stable bond with permanent compression within the glass—designed for applications with high demands in terms of pressure, temperature, and stress.
Metal-fused construction
Glass and metal are permanently bonded together to form a particularly sturdy unit for demanding applications.
Constant compression in the glass
The permanent compressive stress increases the glass's resistance to stress and external influences.
A secure connection under load
The connection remains stable even under pressure, temperature fluctuations, and mechanical stress.
Custom designs for various applications
METAGLAS® solutions are precisely tailored to the installation situation, the medium, and the technical requirements.
The difference becomes apparent in an emergency
METAGLAS® vs. Conventional Sight Glasses
Under normal operating conditions, many sight glasses serve their purpose. However, under real-world conditions such as pressure, temperature, and stress, significant differences become apparent.
Conventional sight glasses
Loses stability immediately if damaged
Susceptible to scratches, pressure, and stress
Can fail suddenly and without warning
Only suitable to a limited extent for extreme conditions
Frequent replacement and increased maintenance costs
Continuous compression ensures maximum stability
High resistance to pressure and stress
No sudden total failure – damage remains manageable
Designed for extreme pressure and temperature conditions
Durable, low-maintenance, and versatile
For applications with lower requirements
When a standard solution is sufficient for your application
Many of our customers are specifically looking for standard sight glasses and already have a clear idea of how they will be used.
If the requirements for pressure, temperature, or load are lower, a standard sight glass can be a suitable and cost-effective solution.
That is why we offer both options—tailored to your needs. On our homepage, you will find a selection of standard sight glasses and compatible components—including the option to submit a direct inquiry.
Here's how the collaboration works
4 Clear Steps to Finding the Right Sight Glass
Every application is different. That’s why we guide you every step of the way – from the initial assessment to the finished, ready-to-use solution.
01
Step 1
Inquiry & Initial Technical Assessment
Please describe your application and requirements to us. We will review the operating conditions and provide you with an initial technical assessment.
02
Step 2
Consulting & Custom Solutions
Together, we will develop a solution that is perfectly tailored to your installation environment and process requirements.
03
Step 3
Design & Detailed Quote
You will receive all relevant technical specifications and drawings, as well as a transparent, no-obligation quote.
04
Step 4
Manufacturing & Reliable Operation
Once approved, we will develop your solution and ensure its reliable, long-lasting integration into your process.
With a global presence
Global representatives for METAGLAS® solutions
International sales partners and technical representatives ensure that METAGLAS® solutions are available worldwide and supported by professional service.
South America
United Kingdom, Ireland
Singapore
Italy
Denmark
Australia, New Zealand
France
India
Poland
South America
Korea
Taiwan
Experience you can count on
About Us - Herberts Industrieglas GmbH & Co. KG
For over 40 years, Herberts Industrieglas has been developing solutions for applications where safety, durability, and reliability are critical.
Our metal-fused sight glasses are used worldwide in demanding industrial processes—anywhere standard solutions reach their limits.
Meet us in person
Upcoming Trade Shows & Industry Events
METAGLAS® regularly participates in international trade shows and industry events—to facilitate technical exchanges, explore new applications, and engage in face-to-face discussions with customers, partners, and prospective clients.
MEORGA MSR-Spezialmesse
Trade show for measurement, control, and process automation technology.
POWTECH Technopharm
Trade show for process engineering, pharmaceuticals, and manufacturing processes.
Valve World Expo
International Trade Fair for Industrial Valve Technology and Process Solutions.
Lounges Cleanroom Processes
An international industry event focused on cleanroom and pharmaceutical processes.
GMP PharmaTechnica
Trade Show for Pharmaceutical Manufacturing & Technology.
ACHEMA 2027
The leading international trade fair for the chemical, pharmaceutical, and process industries.
Industrial Valves & Sealing Technology
Germany's largest trade event for industrial valves and sealing technology.
FAQ
Frequently Asked Questions
For which pressure and temperature ranges is METAGLAS® suitable?
Can METAGLAS® be customized to fit our system?
How does the collaboration work in practice?
Is the consultation really non-binding?
How soon will we receive a response?
What sets METAGLAS® apart from conventional sight glasses?
Can you handle small orders as well?
