a tiltmeter is ready for installation
![a tiltmeter is ready for installation](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/image1-1384.jpg?itok=8OS7l637)
Detailed Description
On the right, a tiltmeter is ready for installation in a shallow borehole. On the left, the tiltmeter is located at the bottom of a 3 to 4 m (10 to 15 ft) borehole lined with a metal casing. The tiltmeter is surrounded by sand to secure it within the borehole so that it does not touch the casing.
Sources/Usage
Public Domain.