| CS-20
 | Built-in memory stores maximum, minimum, average and last reading for recall to the display | NIST Certification included at no additional cost | Accuracy of 0.02% with a resolution of 0.01 RPM | Measures speeds from as low as 1.00 rpm up to 99,999 rpm  | Molded Rubber Shell Provides Additional Physical & Environmental Protection | Can be set for use with 2 optional-sized surface speed wheel (6 inch or 12 inch) | Ideal for measuring speed and length of yarn, fibre and wire |
|
| | YS-20
 | Easy to read display | User-selected units:
•Linear Speed meters/min, feet/min, inches/min
•Length meters, feet, inches
•Revolutions rpm | Combines the function of three seperate instruments in one, easy-to-use device | Maximum diameter of material to be meausured: Yarns 0.5 mm, Wires 0.3 mm | Rugged plastic housing | Yarn Measuring Adapter: Easy-run, rubber coated measuring wheel and guide roller  | 2 Slide in measuring adapters make it simple to convert from contact to non contact or to yarn speed measurement | Built-in memory for last, maximum, minimum values |
|
|