Extech 461891 Contact Tachometer Fast and Accurate RPM With Surface Speed Measurements
Extech 461891 Contact Tachometer Fast and Accurate RPM With Surface Speed Measurements

Extech 461891 Contact Tachometer Fast and Accurate RPM With Surface Speed Measurements

general brand

SSK # GB-EXTCH-461891

Shopping Point 7.750 = RM7.75

Key Features

  • Large 5 digit LCD display is easy to read
  • Built-in memory recalls last MAX/MIN value stored
  • Autoranging with 0.05% accuracy
  • Contact measurements from 0.5 to 19,999rpm plus linear surface speed measures in ft/min or m/min
  • Make contact measurements of rotating objects
  • Measure linear surface speeds in ft/min or m/min using three accessory wheels provided
  • Complete with cone tip, flat tip and spare measurements, four 1.5V AA batteries, four 1.5V AA batteries, and carrying case

Contact Tachometer

Surface wheels measure contact surface speeds (10 to 9,999 rpm) of rotating objects. The memory button holds last reading and recalls min/max readings display. Complete with wheels for linear surface speed (0.2 to 6560 feet/minute; 0.05 to 1999.9 meters/minute) or RPM measurements.
What's in the Box

Comes with cone tip, flat tip and spare wheel for surface speed measurements, four AA batteries, carrying case, and user manual.
Applications

Motor speed, moving fans, pumps, and gears, propeller devices, and many other general maintenance, production, and automotive uses.
What is a Tachometer?

A tachometer is a device that measures the angular speed of a rotating shaft in terms of revolutions per minute (RPM). Also, a tachometer can measure linear speed in terms of feet per minute (feet/minute) or meters per minute.
How do Contact Tachometers Operate?

The sensor tip is placed in direct contact with the rotating object. After 2 seconds an accurate reading is displayed. Linear surface speed can also be measured by placing the edge of the wheel on the moving object.

How do Photo (Non-contact) Tachometers Operate?

First, a small piece of reflective tape (approximately 1/4-inch) is mounted on the object to be measured. Second, the light beam or laser is pointed at the revolving tape. The reflection from the tape provides a reading to be displayed and updated once per second. For the most accurate measurements, the distance between the tachometer and the reflective tape should be within 6 inches for a light beam and up to 6.5 feet for a laser. Fluorescent or bright ambient lights may interfere with the measurement.

 

Range: 0.5 to 19,999rpm/ 0.2 to 6560ft/min/ 0.05 to 1999.9m/min
Accuracy ±(0.05%rdg +1d)
Sampling Time 1sec>6rpm
Resolution 0.1rpm (0.5 to 999.9rpm);1rpm >1000rpm
Dimensions 6.7 x 2.8 x 1.5" (170 x 27 x 37mm)
Weight 9.2oz (260g)
Extech 461891 Contact Tachometer Fast and Accurate RPM With Surface Speed Measurements

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