ANALOGUE TACHOMETER • A budget-price analogue optical tachometer, specifically designed
26th July 1986, Page 113
26th July 1986
Page 113
Page 113, 26th July 1986
— ANALOGUE TACHOMETER • A budget-price analogue optical tachometer, specifically designed
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for applications requiring continuously variable analogue indication of speed, without contact, and at low cost, has been introduced by Graham and White.
The M540 uses the wellproven single-lens reflex system which, with a single reflective mark and a visible light beam, makes it easy to use. Operating up to a metre from the target, direct speed readings to 6,000 rpm are given, to an accuracy of ±2%. Power is derived from AA alkaline batteries for long life.
The M540 is suitable for measuring speeds with an unstable hunting action, or if a "trend" is to be monitored, where digital instruments are unsatisfactory.
Graham White Instruments Ltd 135 IIatfield Road St Albans Hertfordshire AL1 4LZ