Fire Risks in University Laboratories: Why Integrated Fire Protection Systems Are Becoming a Critical Safety Factor for Lasers

As laser systems become increasingly common in university and training laboratories, the number of potential fire risks is also rising—an issue that is often underestimated in practice.

An analysis of service calls related to lasers shows that in vocational schools, colleges, and universities, approximately one in five CO₂ laser systems is affected by a fire incident during its operational life—a pattern that reflects typical risks in applications with frequently changing users. The difference from other market segments lies in the fact that, in such educational institutions, frequently changing users with varying levels of experience work with the lasers.

Practical analyses show that fires in laser processes often develop within a matter of seconds—frequently triggered by seemingly manageable factors such as material residues, incorrect parameters, or brief periods of unattended operation.

The problem is systemic: Laser fires are rarely the result of a single error but arise from a chain of risks—comprising material, process parameters, deposits, exhaust systems, and user behavior. Even brief periods of unattended operation can be enough for a smoldering fire to develop into a full-blown blaze—with potential damage to the machine, infrastructure, and, in extreme cases, the entire building.

Against this backdrop, the focus is increasingly shifting from organizational measures to integrated technical protection solutions. Trotec Laser has collaborated with fire protection experts from Siemens to develop a laser system featuring fully integrated fire detection and suppression. Such solutions are tailored from the outset to the specific conditions in the processing area and can be put into operation immediately without any additional installation effort. The key difference lies in the response chain: automatic fire detection with immediate automated fire suppression—within seconds and independent of user behavior.

Fully integrated solutions of this kind are still the exception in the market. While many systems rely on add-on solutions or retrofitting, this fire protection system is designed as an integral part of the machine architecture and is immediately ready for operation.

In contrast to retrofitted solutions, the following occurs here:

• Detection takes place directly within the machining area

• Automatic activation of the suppression system without user intervention

• Immediate interruption of the process via an emergency stop

The system is designed as a self-contained unit and requires no separate retrofitting or external integration. This not only reduces technical complexity but also minimizes the likelihood of malfunctions or delays in an emergency.

In the Speedy 400 with an integrated fire suppression system, a sensor hose continuously monitors the entire processing area. If the temperature rises above a defined threshold in the event of a fire, a pressure drop occurs in the system—automatically triggering targeted CO₂ suppression.

At the same time:

• the laser process is stopped (emergency stop)

• the power supply is interrupted

• the fire is contained locally at its source

The extinguishing agent is precisely delivered into the processing chamber via nozzles and acts directly at the source of the fire. Since CO₂ extinguishes fires without leaving any residue, sensitive components such as optics and electronics remain largely protected.

This shifts the responsibility for the initial response in the event of a fire from humans to the system—a crucial difference, particularly in training facilities with rotating users.

Significant Risk Reduction and Compliance Benefits

Integrated systems of this kind can realistically reduce the fire risk in laser processes by up to 90–99 %—particularly through the combination of early detection and automatic intervention.

At the same time, they offer benefits that go beyond mere safety:

• Traceability: Event logging and system integration support audits

• Insurance: Structured safety concepts improve risk assessments

• Availability: Rapid restart minimizes downtime

Especially in university settings, where compliance requirements, liability issues, and safety guidelines are becoming increasingly important, this integration is becoming a key decision-making criterion.

Relevance for Educational Institutions

This system enables a fundamental transformation at vocational schools and universities: The safety of the laser machine and its operators no longer depends solely on user behavior but is systemically embedded, offering:

• Safe operation despite changing users

• Reduction of human error

• Standardized, auditable processes

Such systems not only contribute to the protection of people and infrastructure but also to the quality and sustainability of education. The white paper on risk minimization in laser manufacturing offers more detailed insights into the causes of fires, including real-world fire incidents and specific recommendations for action