Laser systems are high investment production machines that require a high level of availability in order to be amortized. Laser condition monitoring methods can be used to avoid breakdowns and maintain a consistent quality. This system is used in many areas including under ground works because it leaves the site clutter-free and provides continuous monitoring with automatic sensors, thus decreasing the risk of unobserved movement. Level monitoring laser system usually needs to be supplemented with occasional optical level readings to pick up accumulated elevation change over several days. Another flexible device for monitoring levels is a manometer.