Record Display for the EPA National Library Catalog


Main Title Multiple-Channel Conductometer for Measuring Salinity Concentrations in Laboratory Flows.
Author Glover., John R. ;
CORP Author Iowa Inst. of Hydraulic Research, Iowa City.;Federal Water Quality Administration, Washington, D.C.
Year Published 1970
Report Number IIHR-128; FWPCA-WP-0218-01;
Stock Number PB-239 628
Additional Subjects Salinometers ; Salt water ; Measuring instruments ; Signal processing ; Electrical conductivity ; Detectors ; Laboratory tests ; Integrated circuits ; Electrodes ; Calibrating ;
Library Call Number Additional Info Location Last
NTIS  PB-239 628 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 24p
A multiple-channel conductometer for measuring salinity concentrations in laboratory flows is described. Channel-to-channel influence and sensitivity to extraneous grounds have been reduced to acceptable levels by a unique probe excitation and detection system which keeps the fluid at ground potential. Conductivity rather than resistivity is measured to eliminate nonlinear concentration-voltage relationships, and special circuits are included to make calibration curves independent of the cable length between probe and instrument. The system has been designed with outputs suitable for analog and/or digital processing and with emphasis on ease of operation and reliability. The electronic system utilizes operational-amplifier technology jointly with discrete components to optimize signal processing and to take advantage of recent advances in the electronic industry.