A Cheap, Semiquantitative Hand-Held Conductivity Tester

• Susan K. S. Zawacky ^[1]
  1. [1] Sewickley Academy
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 72, Nº 8 (August), 1995, págs. 728-729
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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.