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    Hand-Held Contact Tachometer

Hand-Held Contact Tachometer

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Accurately measure rotational and surface speed, as well as length.

Built-in selector switch permits the user to display readings in a wide variety of engineering units. The DT-105/7A-S12 includes a 12" circumference measuring wheel which is offered for safer and easier surface speed measurement by keeping the users hand farther from the moving surface and slowing down the rotational speed.

  • DT-105A (LCD MODEL)
  • DT-107A (LED MODEL)
  • DT-105A-S12 (LCD MODEL with 12" Circumference Wheel)
  • DT-107A-S12 (LED MODEL with 12" Circumference Wheel)
  • DT-107A-12-EXH With Extended Handle


    • Includes NIST Traceable calibration Certificate
    • Built-in memory for last, maximum, minimum and 10 separate readings
    • Rugged cast aluminum housing
    • LCD Version for use in sunlight and for longest battery life (DT-105A)
    • LED version for use in poorly lit or dark environments (DT-107A)
    Display Range0.10 to 25,000 rpm with floating decimal
    Accuracy0.10 to 999.99 rpm: ±0.06 rpm
    1,000.0 to 9,999.9 rpm: ±0.6 rpm
    10,000 to 25,000 rpm: ±0.006% rpm
    DisplayDT-105A: (LCD MODEL) 5 digit 0.47" (12mm) high
    DT-107A: (LED MODEL) 5 digit 0.4" (10mm) high
    Measurement UnitsPer Second: Inches, Centimeters (optional, inquire)
    Per Minute: Revolutions, Inches, Feet, Yards, Meters
    Per Hour: 
    Miles, Kilometers (optional, inquire)
    Total: Revolutions, Inches, Feet, Yards, Centimeter, Meters
    Memory System13 readings are stored in memory and retained for 5 minutes
    (last, max., min., and 10 measurements)
    Over-Range IndicatorFlashing numerals
    Update Time1 second (typical)
    Batteries2 - 1.5 V AA
    Battery LifeApprox. 65 hrs. (DT-105A)
    Life: Approx. 40 hrs. (DT-107A)
    Low Voltage IndicatorFlashing "LO BAT" display (DT-105A)
    "B" display (DT-107A)
    Operating Temp32 to 113° F (0 to 45° C)
    Weight0.9 pounds (400 grams)
    Dimensions7.3" L x 2.4" W x 1.8" H
    Warranty2 years
    Accessories Included2 cone adapters, 1 funnel adapter, 3-1/2" extension shaft, 1 surface speed wheel (6" circumference),carrying case, operating instructions
    Country of OriginTaiwan