Tachometers, ContactPhoto Contact Tachometer Patented design incorporates both a photo and a contact tachometer into one precision instrument Ranges: from 0. 5 to 20 000 rpm in contact mode; from 5 to 99 999 rpm in photo mode; surface speed from 0. 05 to 1999. 9 mpm (0. 2 to 6560 fpm) Linear surface speed measurements are 0. 2 to 6560 fpm or 0. 05 to 1999. 9 mpm Automatically holds last reading for five minutes and recalls min. and max. readings Characters on the large 5
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