Abstract: An in-place inclinometer system is provided. The system allows for improved precision in measurement compared to the prior art, as well as improved ease in packaging, installation, and manufacture. The system utilizes a plurality of probes which can fit into an inclinometer casing which may have an accelerometer within each probe and/or which may pivot relative to an adjacent probe while maintaining approximately the same measurement distance.

Abstract: A recoverable, multiple position borehole strainmeter is provided. The strainmeter includes at least two anchors having pistons for releasably engaging the borehole whereby to mount the strainmeter in the borehole. A pneumatic actuator for controllably, independently actuating the pistons to engage the borehole is provided. A biasing mechanism prevents the pistons from engaging the borehole when the pistons are not being actuated by the actuator, and a relative displacement sensor senses changes in relative displacement between adjacent anchors whereby to monitor relative mass displacement axially along the borehole between the anchors.