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DT-105A/DT-107A Contact Tachometers

  • $329.00
  • Save $36.00

The Series DT-105A/DT-107A Tachometer with microprocessor technology has heralded a superior standard in tachometer accuracy and capabilities for measuring and recording speeds of rotational, linear and surface plus total length.

Offering unprecedented confidence, the DT-105A/DT-107A battery-operated tachometers feature the same rugged, high quality components that have made them the benchmark in the industry. These user-friendly, value-packed units feature memory storage; quick adjustment unit’s knob; length functions; retrieval of last, maximum and minimum values; plus each unit comes standard with a free N.I.S.T. certificate. Units are available with an LCD or vibrant red LED display.

Incorporating the precise technology and user-friendly functions as the DT-105A, the DT-105A/DT-107A-S12 provides an exceptional accuracy in measuring speed and length via its 12” wheel. The larger wheel rotates more slowly than a standard 6” wheel, enabling reliable and safe registration of high speeds.


  • Outstanding accuracy allows usage in the strictest applications
  • Exceptionally rugged die-cast aluminum housing enables usage in the harshest conditions
  • Wide field selection of units in both instantaneous rate as well as totalized length satisfies a multitude of user requirements
  • Large 5 digit display aids user visibility
  • Expansive 10 measurement memory capacity allows quick retrieval of stored data plus additional last, max. & min. values
  • Long-life battery (25-40 hrs. continuous use) eliminates concerns of being down during testing
  • Compact, ergonomic design allows easy grip
  • Rear threaded inserts provides option to mount to stand or other device
  • Available display options of either LCD or vibrant, bright red LED
  • CE Mark combined with free N.I.S.T. certificate provides peace of mind due to the quality of the instrument


Model DT-105A DT-105A-S12 DT-107A DT-107A-S12
Display 5 digit 0.47” (12 mm) high LCD 5 digit 0.47” (12 mm) high LCD 5 digit 0.4” (10 mm) high LED 5 digit 0.4” (10 mm) high LED
Wheel size 6 inch 12 inch 6 inch 12 inch
Display Range 0.10 – 25,000RPM with floating decimal
Accuracy ±0.06 rpm: 0.10 – 999.9 rpm
±0.6 rpm: 1,000.0 – 9,999.9 rpm
±0.006% of reading ±1 digit (±2 rpm max.) 25,000 rpm
Measuring Units Revolution: RPH, RPM; Feet: FPH, FPM; Miles: MPH; Yards: YPH, YPM; Inches: IPM; Meters: mPH, mPM; Length: m, cm, inches, feet, yards; Total Revolutions: REV
Memory System 13 readings are stored in memory and retained for 5 minutes (last, max., min., and 10 extra measurements)
Detection Optical coupler, 60 pulses/rev.
Update Time 1 second (typical)
Over Range Indicator Flashing numerals
Power Requirement 2 AA 1.5V batteries (Life: Approx. 40 hrs.)
Operating Temperature 32° – 113° F (0° – 45° C)
Construction Die-cast aluminum housing
Dimensions 7.2” L x 2.4” W x 1.8” H (182.5 mm x 60 mm x 46 mm)
Product Weight 0.9 lb (400 g)
Package Weight Approx. 2 lb (.91 kg)
Approvals CE
Warranty 2-Year
Included Accessories Two AA Batteries, 2 cone adapters, funnel adapter, 3½” extension shaft, carrying case, NIST certificate, master wheel (6” cir.)

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