Surface clinometers are tilt sensors used to measure changes in the inclination of a structure. They are permanently installed to provide automatic long-term monitoring. Surface clinometers are available in uniaxial and biaxial versions, equipped with solid-state accelerometer or force-balanced servo-accelerometer sensors. The S520 clinometer line is housed in a rugged stainless steel cylinder, IP68 200 KPa. Spirit level, adjustable mounting bracket and anchor plate are included.