A RESISTANCE TIDE GAUGE.
Abstract
The design, construction, calibration, and field application of a simple resistance-type tide gauge are presented. The gauge measures coastal water level in relation to an elevation reference. A summary of previously available tide gauges is made with advantages and disadvantages noted. The gauge sensor consists of a high resistance wire within a mercury-filled capillary. The mercury level in the capillary is pressure-linked to the sea water column and responds to changes of water level over a wide period range. The mercury column height changes the current-conducting length of the resistance wire in the capillary. The change in resistance is, therefore, linear with column height. The resistance element forms one arm of a Wheatstone bridge. Laboratory evaluation and calibration are described. Recorded field observations of the resistance gauge are compared to the record of a 'standard' tide gauge at the same location. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1967
- Accession Number
- AD0822797
Entities
People
- Norman Brown Pigeon
Organizations
- Naval Postgraduate School