Direct Contact Tachometer with surface speed accessories

  • 0.10 – 25,000 RPM
  • Built-in memory for last, maximum, minimum and 10 separate readings
  • Rugged cast aluminum housing
  • LCD version great for sunlight
  • LED version great for dim locations
  • Includes traceable calibration certification
  • Multi-Mode capability measures RPM, mPM, YPM, FPM, IPM and total meters, yards, and feet
linear speed and length

DT-105A, DT-107A and DT-107A-12 contact tachometers accurately measure rotational and surface speed, as well as length. A built-in selector switch permits the user to display readings in a wide variety of engineering units. The DT-107A-12 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.

All models are supplied as a complete kit including 6" circumference surface speed wheel, two cone tip adapters, funnel tip adapter, shaft extension, two AA batteries and and an operating instruction manual —all supplied in a foam-fi tted carrying case.

DT-105A – LCD Display
DT-105A 12 LCD Display
DT-107A – LED Display
DT-107A-12 – LED Display

Specifications Direct Drive Tachometer

Models DT-105A(LCD version)
DT-107A(LED version)
Measuring Range 0.10 to 25,000 rpm with floating decimal
Accuracy 0.10 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
Measuring Units Per Minute: Revolutions, Meters, Yards, Feet, Inches
Per Hour: Feet, Yards, Miles, Meters, Revolutions
Total:Revolutions, Centimeters, Meters, Yards,
Feet, Inches
Per Second Revolutions, Inches, Feet, Yards,
Centimeters (optional, inquire)
Memory System 13 readings are stored in memory and
retained for 5 minutes
(last, max., min., and 10 measurements)
Over-range Indicator Flashing numerals
Detection Optical coupler, 60 pulses/rev
Update time 1 second (typical)
Batteries Size: 2 1.5 V AA
Life: Approx. 65 hrs. (DT-105A)
Life: Approx. 40 hrs. (DT-107A)
Operating Temp 32° to 113° F (0 to 45° C)
Weight 0.9 pounds (400 grams)
Dimensions 7.3" L x 2.4" W x 1.8" H
(185.4 x 60.0 x 45.7mm)
Warranty 2 year

Ordering information for DT-105/7L

DT-105A DT-105A Complete Kit $250.00
DT-107A DT-107A Complete Kit $250.00
DT-107A-12 DT-107A-12 Complete Kit (Includes 12" circumference wheel) $310.00