The spirit level has a bottom wall (28) comprising an outer surface (26) in form of a measurement surface. A bubble body is arranged in a profile body (13), where bubble is optically detected over an opening passing-through a head wall (32). The profile bo...

Device for formation of linear optical markings comprises a light source with an associated semi-transparent lens. The lens (28, 30) has a groove-shaped geometry with a longitudinal axis perpendicular to the optical axis of the light source, whereby the le...

Laser unit for a laser level device for building and construction, comprises a laser light source with a housing (12) that is surrounded by a container (14). The unit is configured so that the housing can be adjusted along the container axis.

Spirit level comprises an elongated body (2), preferably of metal, plastic end caps (7) and at least one bubble level. At least one of the end caps forms a measurement surface and at least one of the end caps is detachable from the spirit level body.