INSTRUMENTATION 



b. Conductivity 

 Bridge 

 Salinometer 

 (University of 

 Washington) 



a. roiboro Company 



b. Serfaas Bridge 



Salinity Accuracy: * O.C 

 part per thousand 

 Repeatability: * 0.001 

 part per thousand 



Accuracy: ±1.0 part per 

 thousand (0.1 part per 

 thousand If calibrated 

 before and after use) 



Visual observation, chemi- 

 cal analysis, and recording 

 on standard log format 



Dial indicators 



Circular chart 



Miniaturized (transistor, 

 modules, etc.) Salinometer 

 (Atlantic Research Corpora- 

 tion under contract to U.S. 

 Navy Hydpographlc Office) 



Dial Indicator 



Dial Indicator 



Inference from other 



ture, salinity, and 

 pressure or depth) 



Indirectly - Sound Velocity 

 Meter (National Bureau of 

 Standards; Chesapeake Bay 

 Institute, Johns Hopkins 

 University) 



Sound Velocity Range: 

 Covers all sound velocities 

 in the medium (oceans) ovei 

 a temperature range of 1.0 

 to 1*0.0 degrees centigrade 

 and depths to 22,500 feet. 

 Accuracy: ± 0.1 feet per 



A) Digital display on electronic 



Mechanical Pressure 

 Transducer (Bourdon 

 tube, bellovs, 

 helical coil, 

 aneroid, etc.) 



Electronic Pressure 

 Transducer 

 ("VT3RATR0N", strain 

 gauge, variable 

 reluctance gauge, 

 etc.) 



Probable error of depths: 

 ± 15 feet for depths less 

 than 3, COO feet; at 

 greater depths to about 



Depth: to 1,500 feet 



Accuracy: ± k feet 

 (Accuracy of the trans- 

 ducer is generally 

 limited by the recording 



apparatus) 



Visual observation on 

 thermometer ■ a scale and 

 recording on standard log 



Dial indicator 

 Paper strip chart 

 ELectroolc recorders 

 (such as magnetic tape) 



A) Visual graphic presentation 



B) Output recordings compatible 

 for modern day electronic 



E-2 



