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Handy revs

4th October 1974, Page 54
4th October 1974
Page 54
Page 54, 4th October 1974 — Handy revs
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This portable, battery-operated digital tachometer operates by the conventional technique of a conical rubber contactor held against a rotating shaft end.

This drives an optical encoder generating 60 pulses per revolution. A crystal oscillator provides an accurate one-second measuring base, enabling the tachometer to read directly in rpm.

Price: £99.

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