Clinometers; Tilt sensors
Tiltmeters are devices used to monitor the change in inclination of a ground surface point; see Dunnicliff (1993) for a detailed description. The device consists of a gravity sensing transducer (e.g., servo-accelerometer, electrolytic tilt sensor, pendulum-actuated vibrating wire, etc.) capable of measuring changes in inclination as small as one arc second (0.00028 degrees). They are used to monitor slope movements where the landslide failure mode is expected to contain a rotational component. Advantages of using tiltmeters are their light weight, simple operation, and relatively low cost; tiltmeters can be read manually or automated by connecting to a data logger.
- Dunnicliff, L., 1993. Geotechnical Instrumentation for Monitoring Field Performance. New York: Wiley.Google Scholar