Laser EnclosuresLaser Castle - rapid-build, modular laser safety cabins: Passive Class 1 Enclosures for Class 4 Lasers - CE Certified to EN 60825-4

Lasermet’s Laser Castle® laser safety cabins protect personnel from the dangers of high powered laser beams by absorbing the laser power in the specially designed walls and roof.

These modular, Class 1, room-sized enclosures are tested and certified to international laser safety standards (IEC 60825-4 Safety of Laser Products Part 4 – Laser Guards) and can be rapidly designed, built and installed by Lasermet.

They are supplied with Lasermet’s Interlock® control system and high quality, dual message, dual colour, low voltage, illuminated LED signs. Lasermet’s audible warning sign the Audio Alert can also be installed. A High Definition CCTV system covers the operation inside the cabin and provision is made for fume extraction, making this a cost effective and extremely easy method of enclosing the laser system, which then complies to international laser safety standards.

Active “Laser Jailer®” upgrade option

The passive cabin can be upgraded to an active laser safety cabin by specifying the Laser Jailer® Active Laser Guarding System. This patented modular system has active detector panels covering the internal walls and roof of the cabin to detect high powered laser beam strikes. If this occurs, Lasermet’s fail-safe technology isolates the laser safety input in less than 50ms. The laser machine responds to this laser termination signal and the laser radiation is terminated.


The cabins are ideal for laser welding robots that need to be contained as they typically use 4kW lasers in their operations. Higher powered lasers can also be accommodated, for example, 10kW or 20kW.


Vents are built into the walls of the enclosure to enable fume extraction. See Fume Extraction

PEL ratings

The PEL ratings for the passive cabin are listed below.

Irradiated Area
PEL (T3) 10 s
PEL (T2) 100 s
4 mm²
310 MW/m² 170 MW/m²
2000 mm²
3.1 MW/m² 1.7 MW/m²

Specification to the laser safety standards ANSI Z136.1 and IEC 60825-1

To meet the laser safety requirements of ANSI Z136.1 and IEC 60825-1, the enclosure requires a safety Interlock® control system including appropriate warning signs – both of are designed and manufactured by Lasermet.

Compliance to EN ISO 13849-1 (Safety of machinery – Safety-related parts of control systems)

The ICS-7-OEM Interlock® Control System meets Performance Level e (PLe) of ISO 13849-1 and is ideal for compliance to the required laser safety standard.

Equipment and system designed, manufactured and installed

The system comprises of an enclosure made from panels constructed from passive laser safety compliant material and certified to the Laser Safety Standard EN IEC 60825-4. The panels are connected together (including a roof) to form the enclosure.


Access into the enclosure is provided by double doors operated by a sliding mechanism to provide maximum access while using minimum space. Single hinged doors are also available.

Illuminated Sign

A dual message, dual colour, LED laser warning sign above the door indicates the status of the laser as it is controlled by the Interlock® controller. The LED sign, including the laser warning triangle, reads “Danger Laser On” illuminated in red when the laser is powered on, and reads “No Hazard Laser Off” illuminated in green when the laser is off.

Closed Circuit TV (CCTV) monitoring system

A CCTV system is installed with the enclosure. Either one or two remotely controlled cameras operate inside the enclosure transmitting video to the video monitor(s) outside the enclosure. When two cameras are installed, the video monitors can be controlled to show the view from either camera using a joystick controller.

Electrical system

The electrical wiring is run in containment channels inside the enclosure.


Being a lightweight, modular design, the enclosure can be dismantled, moved to another location, and be re- assembled very quickly. The standard sized panels also enable the enclosure size to be changed. This is an ideal, flexible, lightweight solution for today’s rapidly changing environment.

Have a look at this Blog to find out more on laser safety cabins

Control of Substances Hazardous to Health (COSHH)


Fire can be easily extinguished in the early stages if quickly tackled with a water, CO2, dry powder or BCF extinguisher.

Smoke and Fumes

Burning panels give off carbon monoxide and styrene gas. The amount given off is less than that emitted by wood and other traditional construction materials in comparative tests. The smoke hazard of burning panels is similar to that of any other construction, decorating or packaging material. See Fume Extraction

Cleaning & Maintenance of Panels

Panels may be washed down with fresh water from a hose or a bucket. Water may be heated to 60°C. A solution of fresh water and Tepol or non-aggressive detergent may be used to remove heavy deposits, followed by a fresh water rinse.

CE Certified Laser Blocking Partitions

We also supply CE certified laser blocking partitions with or without doors, for dividing one laser lab into two or more sections. These semi-permanent partitions are cost effective and extremely quick to install, without the mess and fuss of building a brick or plasterboard wall. As such they offer an alternative to traditional methods of room division, and can also be easily undone at a later date if required. Alternatively they can be left as a permanent installation.

All laser safety partitions are tested and certified to EN 60825-4 with the following specification:

Irradiated Area
PEL (T3) 10 s
PEL (T2) 100 s
4 mm²
310 MW/m² 170 MW/m²
2000 mm²
3.1 MW/m² 1.7 MW/m²


Key Details

Laser Safety Compliance

The Laser Castle® laser enclosure (including its laser interlock system) complies with the requirements of

IEC EN 60825-1:2014 Safety of Laser Products

and complies with the following European Directives and Standards:
2006/42/EC 17 May 2016 Machinery Directive
2014/30/EC 20 April 2016 EMC Directive
2014/35/EU 20 April 2016 Low Voltage Directive
EN 60825-4:2006+A2:2011 Safety of Laser Products, Part 4: Laser Guards
EN ISO 13849-1:2015 Safety of Machinery: Safety Related Parts of Control Systems
IEC 60947-1:2007+A2:2014 Low Voltage Switchgear and Control gear
EN 61010-1:10 June 2010 Safety Requirements for Electrical Equipment