Inclinometer systems are commonly used to measure horizontal ground displacements at landslides, pile wall construction, tunneling, and excavations. These systems have been in widespread use since the late 1960s (Dunnicliff, 1988). My primary goal with this research was to determine the accuracy and precision achievable with an inclinometer. I also sought to determine the variables that contribute to or reduce accuracy.

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Inclinometer systems consist of an inclinometer casing (with four vertical grooves spaced 90 degrees apart), a portable traversing probe, a control cable, a readout/data recorder, and monitoring accessories (a pulley and wheel). One groove is selected as...

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