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  Home > JCE Print > Journal of Chemical Education > Issues > 1995  > August  >
Secondary School Chemistry
Inventory Control
A Cheap, Semiquantitative Hand-Held Conductivity Tester
Susan K. S. Zawacky
Sewickley Academy, Sewickley, PA 15143
Cover
August 1995
Vol. 72 No. 8
p. 728
Abstract
This article describes the construction and use of a simple hand-held conductivity tester which gives roughly quantitative results when solutions ranging in electrolyte concentration from 0.001 to 0.10 M are tested. The tester uses a bar-graph LED driven by an LM3914 IC and is powered by a single 9V battery. This tester can be constructed from parts available at Radio Shack stores for about $10 using a soldering iron and a few other tools.
More Information
*  Citation
 Zawacky, Susan K. S. J. Chem. Educ. 1995 72 728.
*  Keywords
*  History
 Created:
Last Updated:		 10/1/1999
5/22/2006
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