I haven't used these myself, but out chemist who has been working with
high school teachers is completely sold on them. There are apparently a
large number of sensors - dissolved oxygen, pH, photosynthesis,
conductivity, and others.
Janice
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Janice M. Glime, Professor
Department of Biological Sciences
Michigan Technological University
Houghton, MI 49931-1295
jmglime at mtu.edu
906-487-2546
FAX 906-487-3167
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