Abstract: The invention relates to a laser apparatus as construction laser apparatus (10) comprising a light source accommodated inside a housing (12). For providing an increased protection of the apparatus and for adjusting the housing and thus the laser plane to the desired extent with constructive simple measurements, it is suggested that the housing (12) is enclosed by a receiving means (14), along which said housing (12) of the laser is arranged in adjustable manner.

Abstract: A water or spirit level is composed of an elongated body, preferably of metal, at least one bubble mounted in the elongated body, and end caps, preferably of plastics material, at the end faces of the elongated body, wherein at least one outer surface of the elongated body constitutes a preferred measuring surface. At least one of the end caps is releasably connected to the level body such that the end cap can optionally be removed and once again replaced.

Abstract: A laser level with a housing composed of two parts for storing the laser level in a protected manner, wherein the laser level is composed of an instrument body, bubble levels in the instrument body, a laser beam generator with lens system and a fixed leg and two vertically adjustable legs. One of the housing parts is provided with receptacles for the legs, wherein the receptacles are integrally formed at an inner side of the bottom of the housing part. The other housing part has receptacles for the legs, wherein the receptacles are integrally formed in an outer side of a cover of the housing part. At least one stand thread is provided at an inner side of the outer housing part.

Abstract: A laser level with a housing composed of two parts for storing the laser level in a protected manner, wherein the laser level is composed of an instrument body, bubble levels in the instrument body, a laser beam generator with lens system and a fixed leg and two vertically adjustable legs. One of the housing parts is provided with receptacles for the legs, wherein the receptacles are integrally formed at an inner side of the bottom of the housing part. The other housing part has receptacles for the legs, wherein the receptacles are integrally formed in an outer side of a cover of the housing part. At least one stand thread is provided at an inner side of the outer housing part.