• Built-In memory for last, maximum, minimum and 10 seperate readings 
• Rugged cast aluminum housing
• CE mark Compliant with applicable EU directives
• Minimum shaft loading over-speed protection Prevents potential instrument damage
• Includes NIST Calibration Certificate

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

Specifications

Display 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
Measurement Units
per Minute	Revolutions, Meters, Yards, Feet, Inches
per Hour	Feet, Yards, Miles, Meters, Revolutions
Total	Revolutions, Inches, Feet, Yards, Centimeters
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)
Low Voltage Indicator	Flashing "LO BAT" display (DT-105A) "B" display (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
Warranty	1 Year
Accessories Included	2 Cone adapters, 1 funnel adapter, 3-1/2" extension shaft, 1 surface speed wheel (6" circumference, carrying case, operating instructions.