NASA NTRS · 19770000353
Brushless tachometer gives speed and direction
Abstract
Brushless electronic tachometer measures rotational speed and rotational direction, maintaining accuracy at high or low speeds. Unit is particularly useful in vacuum environments requiring low friction.
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Nola, F. J.. 1977-03-01. Brushless tachometer gives speed and direction. https://ntrs.nasa.gov/citations/19770000353
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