Patent ID: 7395604

Claim:
A laser level comprising: a level adjustment device comprising: a tilt sensor, which generates an output signal corresponding to a measurement, a processor unit, which receives the output signal from the tilt sensor and proceeds with calculation on the output signal, and an actuator, which is controlled by the processor unit based on the calculation to a horizontal position of the tilt sensor; a temperature control device comprising: a thermal insulation chamber, in which the tilt sensor is received, wherein the temperature control device detects an external temperature outside the thermal insulation chamber and generates a corresponding first temperature signal, and wherein the temperature control device detects an internal temperature inside the thermal insulation chamber and generates a corresponding second temperature signal, and a control unit, which receives the first and second temperature signals and, based on the temperature signals, controls a temperature adjustment unit to adjust the internal temperature inside the thermal insulation chamber; and a laser device movable with the movement of the tilt sensor of the level adjustment device to correspondingly adjust horizontal position.