Laser classes according to DIN EN 60825-1

Recommendations for the safe handling of rotating lasers, line lasers and positioning lasers

The safety regulations according to EN 60825-1 are binding for measuring devices with laser radiation. Most laser leveling devices are classified in laser class 2 or 3R. Rotation lasers and positioning lasers in particular are often classified in laser class 3R and should not be purchased without due consideration. We have derived some recommendations for you from this.

Laser können das Auge schädigen. Foto: hikmetyildiz (iStock)

Laser class 2

This class mainly includes rotation lasers, line lasers and laser distance meters. The laser radiation emitted is low and the eye is sufficiently protected by the natural defense reaction.

A prolonged look into the beam should be avoided.

Laser class 3R

The laser radiation is many times higher than in class 2. Looking directly into the laser beam can be dangerous.

Class 3R lasers should only be used under conditions where direct viewing of the beam is unlikely.

The devices may only be used in a controlled working environment. For example, in closed rooms and workshops. Access to the beam area must be restricted to instructed persons.

Rotary laser with class 2 or 3R?

Rotation lasers have a point prism and generate a laser line by rotating the laser head. It is therefore impossible to look into the laser beam for any length of time. Under these conditions, the use of class 2 and 3R rotating lasers is safe.

However, random reflections can occur outdoors due to mirrors and glass surfaces. It is therefore not advisable to operate a class 3R rotating laser outdoors.

On construction sites or company premises, the responsible laser safety officer can make use of his domiciliary rights and prohibit tradesmen from operating class 3R rotating lasers.

With our Q3 and Q3G rotating lasers, you can switch between laser classes 2 and 3R and thus work in the laser class that is best for you. This allows you to use the better visibility of laser class 3R in the controlled environment of interior work and switch to the unproblematic laser class 2 on larger construction sites or in outdoor areas.

line laser

Line lasers are usually classified in laser class 2. Although these devices usually have significantly more powerful laser diodes installed, their power is spread by a line prism. The power measured outside the device then corresponds to laser class 2, meaning that the use of these devices is unproblematic. Due to their design, however, the working range of a line laser is significantly smaller than that of a rotary laser. Line lasers are not fully recommended for larger construction sites or levelling work outdoors.

positioning laser

Positioning lasers are offered in laser classes 2, 3R or even 3B. These devices are usually permanently installed in workshops or assembly halls. Class 3R or 3B devices must be installed in such a way that they do not pose a hazard.

Laser safety eyewear is not laser safety eyewear

Laser goggles and laser safety eyewear are two fundamentally different types of eyewear, each with specific functions. Laser goggles are designed to improve the visibility of a laser beam, usually in bright light environments, by emphasizing the specific wavelength of the laser. They are often used in the construction industry or for alignment work. Laser safety goggles, on the other hand, are designed to protect the eyes from the potentially harmful radiation of a laser. They are made to absorb or reflect certain wavelengths of the laser to prevent damage to the eyes. This type of eyewear is essential in laboratories, medical facilities and when working with powerful lasers. Mixing up these two types of eyewear can pose serious risks to eye safety.

Repairs only by qualified personnel

The laser radiation is measured outside of the device for classification into a laser class. In other words, where it can cause damage to the eye. Inside a rotary laser, line laser, laser distance meter or positioning laser, the laser radiation can be significantly higher. For this reason, protective covers or housings should only be opened by qualified personnel.

With our repair and calibration service, we offer you cost-effective maintenance of your devices at a flat rate. And for many years after purchase and over the entire expected service life.