Alternatives a Texas Instruments i Vernier
(Diverses empreses fabriquen sensors, interfases amb el PC, etc.)
Data logging L Rogers
http://www.le.ac.uk/se/lto/logging/lrcv.html
Pico Technology
http://www.picotech.com/index.html
Tain Lab, Australia
http://www.tain.com.au/index.html
LAO en San Francisco
http://science.usfca.edu/pti/index.htm
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