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YS-20 Speed - and Length Meter as well as Tachometer for contact and non-contact measurement

Made in GermanyThe YS-20 Combination Hand-Held Digital Tachometer combines the best features of both contact and non-contact models to accurately measure RPM, surface speed and length.

When using the non-contact mode, rotational speed (RPM) is measured using a visible beam of light. The YS-20 can be up to 14 inches away from the small piece of reflective tape that is affixed to the rotating element. In the contact operating mode, the speed is sensed by directly contacting rotating device using one of the contact adapters supplied with the instrument.

In other applications where surface or linear speeds are to be measured, the universal wheel is used for direct readout of feet/min, meters/min or inches/min, as selected by the end user. The YS-20 can also be used to measure the accumulated total of continuously running material such as paper, wire being wound on a spool, or to check the calibration of on-line counters and totalizers.


  • Combines the function of three seperate instruments in one, easy-to-use decvice
  • 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
  • NIST-Traceable Certification Included
  • 5 Year Warranty

User-selected engineering units
Linear Speed Length Revolutions
feet/min feet rpm
meters/min meters  
inches/min inches  

LCD Display

Units of Measure Indicators show the units of measure, selected by the user.

Contact Indicator shows if contact or non-contact operation is selected.

On-Target Indicator confirms that the measurements are reliable.

Low Battery Indicator alerts the operator if the batteries need replacement.

Memory Indicators are illuminated when the maximum, minimum, average and last readings are recalled to the display for viewing.
LCD Display YS-20


Complete Kit
Delivery includes:
  • Tachometer in carrying case with standard accessories:
  • 1 Adapter for yarn speed measurement (nr. YS-F)
  • 1 Adapter for contact measurement (nr. YS-C)
  • 1 Rubber Tip (nr. 99901R)
  • 1 Measuring wheel 10 cm circumference (nr. 99902R)
  • 1 Set of reflective tapes (nr. 10009S)
  • 2 Batteries

RPM:Non-Contact: 1.00 - 99,999 rpm
Contact: 1.00 - 19,999 rpm
Surface Speed:0.30 - 6,500 feet/min
0.10 - 1,999 meters/min
4.0 - 78,000 inches/min
Length:0.01 - 99,999 feet
0.02 - 99,999 meters
1.0 - 99,999 inches
Resolution:.01 from 0 - 100
.1 from 100 - 1,000
1 from 1000 - 99,999
Yarn/Wire Diameter (max.):Yarn: 1mm Wire: 0.3mm
Accuracy:± 0.02% of reading or 1 digit
Display:5 - Digit LCD, 10mm high
Decimal Point:Automatic
Memory System:Maximum, minimum, and last reading (retained in memory for the life of the batteries)
Measurement System:Non-Contact: Visible LED light beam
Contact: Contact adapter
Sensing Distance:Up to 14 inches (350mm)
Display Update Time:0.5 seconds or one measuring
Auto Power Off:After 30 seconds of non-use (minimum, maximum and last reading retained in memory)
Battery Life:20 hours continuous use
Weight:6 ounces (170 grams)
Housing Material:ABS Plastic
Operating Temperature:32 to 122º F (0 to 50º C)
Storage Temperature:-4 to 150º F (-20 to 70º C)
Optional Accessories:Shaft extension, 3.15 inches (80 mm)
Warranty:5 years


CDT-TAPE Reflective Tape

  • Reflective Tape

More details

CDT-TAPE Reflective Tape 126538

CDT-YSL-ADAP Contact Adapter

    More details

    CDT-YSL-ADAP Contact Adapter 126540

    Li-Ion Rechargeable AA Batteries via the USB to USB-C

    • Li-Ion rechargeable battery
    • Stable voltage of 1,5 V over 95% of the runtime
    • Charged via the USB to USB-C cable

    More details

    Li-Ion Rechargeable AA Batteries via the USB to USB-C 127554

    Buy Now

    YS-20 Yarn Speed & Length Meter
    € 492,00 

    10009S - Reflective Tape 4 Sheets 35 1/2
    € 15,00 
    CDT-YSL-ADAP Yarn speed adapter
    € 306,00 
    Li-Ion Rechargeable AA Batteries - 4 pcs (with USB to USB-C cable)
    € 25,00 
    All mentioned prices are excluding VAT & excluding shipment costs.
    Availability: Available: 1 - 3 days, Delivery time: 1 - 3 weeks, special order request

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