A resistance tide gauge
Pigeon, Norman Brown
Denner, Warren W.
MetadataShow full item record
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
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Ediin, Robert L.; Lamb, Jay W. (Monterey, California. U.S. Naval Postgraduate School, 1966-05);A small, direct current electromagnetic conduction pump was designed according to the equivalent circuit theory of A. H. Barnes. Design was aided by data from a prototype also constructed by the authors. Distinguishing ...
Dwyer, Jolly Vancook, Jr.; Sestak, Joseph Ambrose; Chaddock, Jack Bartley (Cambridge, Massachusetts; Massachusetts Institute of Technology, 1949-05-20);In typical refrigerating systems, an expansion valve is the device to meter the flow of refrigerant. The capillary tube possesses certain advantages over the expansion valve, resulting in a considerable saving in manufacturing ...
Nematic liquids in weak capillary Poiseuille flow: structure scaling laws and effective conductivity implications Zhou, Hong; Forest, M. G. (2007);We study the scaling properties of heterogeneities in nematic (liquid crystal) polymers that are generated by pressure-driven, capillary Poiseuille flow. These studies complement our earlier drag-driven structure simulations ...