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SKF Multi–functional digital tachometer TKRT 21

Order model: TKRT 21

Maker: SKF


Helps to detect abnormal rotating and linear speeds

The TKRT 21 is a multi-functional digital tachometer that uses laser or contact measurement to determine rotational and linear speeds. The device allows fast, easy measurement at a safe distance from rotating machinery. It offers high speed and distance versatility in several measurement modes. In addition, it facilitates easy measurement when straight-line access is difficult. The TKRT 21 is supplied with a basic set of contact adaptors and can be used with either standard or rechargeable batteries.

  • User can choose to measure a range of attributes, including: rpm, Hz, m, ft or in per minute or second, and length
  • Compact, with large LCD display. Operated using one hand, it includes a basic set of contact adaptors. Runs on standard or rechargeable batteries.
  • Aimed at maintenance staff, it is well suited for inspecting rotating equipment and machinery – using preventive maintenance to optimise operations
  • Laser sensor allows fast and easy measurement at a safe distance from rotating machinery. Usable in many applications, as it has several measurement modes and wide speed range
  • Enables easy measurement in areas where straight-line access is difficult
DesignationTKRT 21
GeneralLow battery indicatorYes
Auto switch offYes
Display updateContinuous
ControlsDirect selector switches
Housing materialABS (plastics)
MeasurementOptical modesrpm and Hz
Contact modesrpm and Hz, meters, feet, inch, per min and per sec
Count modesDistance mode
Speed capture featureMaximum, Minimum or Average rate
Linear speedMeters, feet, inch, per min and per sec
Optical measurementRotational speed range1 to 99 999 r/min
Accuracy±0.01% of reading ±1 digit
Measuring distance25 to 1 200 mm (1 to 47 in)
Angle of operation±30°
Laser sensorBuilt-in class 2 laser
Contact measurementRotational speed rangeMax. 20 000 rpm for 36 000 sec
Accuracy±0.1% of reading ±1 digit (> 120 rpm)
Contact adaptorsIncluded with removable cones and wheel 6”
Battery and powerPower source2 x AA batteries, rechargeable can be used
Run time ca.50% Laser-On:  12:00 h
Size and weightProduct dimensions295 × 70 × 38 mm (11.6 × 2.8 × 1.5 in)
Case dimensions260 × 85 × 180 mm (10.2 × 3.3 × 7.1 in)
Unit weight270g (0.6 lb)
Total weight (incl. case)850g (1.9 lb)
Operating requirementsOperating temperature0 to 40 °C (32 to 104 °F)
Storage temperature–20 to 45 °C (–4 to 113 °F)
Type of protection for indication onlyIP 40
Case contents1 × Tachometer TKRT 21
2 × Conical tips
1 × Wheel
2 × AA batteries
1 × Set of reflective tape
1 × Instructions for use

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