NASA NTRS · 19720000481
A magnetic mouse activity meter
Abstract
Activity meter has been developed using Hall effect devices that record passage of selected groups of magnetically tagged mice. Two small permanent magnets are implanted in belly and back of selected mice and electronic circuits are activated as mice move between cages. System has advantage over tagging, detecting, and identification methods currently used.
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Henry, J., Rader, R. P.. 1972-08-01. A magnetic mouse activity meter. https://ntrs.nasa.gov/citations/19720000481
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