Click Image to Enlarge Protek T100

A photo and contact tach in one instrument Measures RPM and surface speed Records the minimum, maximum last value 0.5 to 100,000 RPM measurement range 0.05% accuracy 5 Digit LCD For a great alternative see: IWH DT-5650

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Range

Photo Tach 5 to 99,999 RPM Contact Tach 0.5 to 19,999 RPM Surface Speed (m/min) 0.05 to 1,999.9 m/min Surface Speed (ft/min) 0.2 to 6,560 ft/min

Resolution

Photo Tach 0.1 RPM (0.5 to 999.9 RPM) 1 RPM (over 1000 RPM) Contact Tach 0.1 RPM (0.5 to 999.9 RPM) 1 RPM (over 1000 RPM) Surface Speed (m/min) 0.01 m/min (0.5 to 99.99) 0.1 m/min (over 100m/min) Surface Speed (ft/min) 0.01 ft/min (0.1 999.9 ft/min) 0.1 ft/min (over 1000 ft/min)

Sampling Time

Photo Tach 1 sec over 60 RPM Contact Tach 1 sec over 6 RPM Accuracy ± (0.05% Rdg + 1D) Photo Tach Detection Distance: 2 to 6 inches (50 to 150mm) Max. Detection Range: 12 inch, (300mm) typical depending on ambient light

General Specifications

Display 5 Digit LCD Power (4) 1.5V AA Batteries Operating Temperature 0 to 50°C at a relative humidity of 0 to 80% Size 6.7" H × 2.8" W × 1.5 D" Weight 8.8 oz. Supplied Accessories Manual, Carrying case, RPM Adapter (cone), RPM Adapter (funnel), Surface speed test wheel, Reflective tape