YS-20 - electronic speed and Length Meter - speed-and Length Meter as well as Tachmeter for contact and noncontact measurements. Combines the function of three separate instruments in one, easy to use device. 2Slide in measuring adapters make is simple to convert from contact or to yarn speed measurement. Maximum diameter to be measured: Yarns 0,5 mm, Wires 0,3 mm. Built in memory for last, maximum, minimum values. Measuring ranges: Yarn / Wire 0.1...99999 m / min, or 0,02...99999 m (or feet, inch), Weight 150gr, LxWxH=145x60x30 mm. Delivery includes: Tachometer in carying case, Adapter for yarn speed measurement (YS-F), Adapter for contact measurement (YS-C), Rubber Tip (99901R), Measuring wheel 10 cm circumference (99902R), Set of reflective tapes (10009S).