Extech 461825 Combination Photo Tachometer/Stroboscope


Product Tags:
Product Tags:
Extech 461825 Combination Photo Tachometer/Stroboscope


  • 461825 Tachometer Stroboscope Combination Photo
  • Stroboscope course and fine flash rate adjustments to freeze and analyze rotating objects
  • Battery operation brings motion analysis to any location
  • Unique display features characters that reverse direction depending on measurement mode
  • Large 0.4" (10mm) 5 digit LCD display
  • Microprocessor based with quartz crystal oscillator to maintain high accuracy
  • Tachometer memory stores last, max, and min readings
Extech 461825 Tachometer Stroboscope Combination Photo.

Combination Photo Tachometer/Stroboscope
Perform Tachometer RPM measurement (5 to 99,999 rpm) and stroboscopic speed and motion analysis (100 to 100,000 fpm/rpm). This product's unique display reverses character direction depending on which measurement mode you are using.

Additional Features
The tachometer's memory stores its last/max/min readings for recall. The strobe features course and fine flash rate adjustments in three ranges.

Reflective Tape for Photo Tachometers
Reflective Tape For Photo Tachometers (461937) is made for use with any brand Photo Tachometer. Place a piece of reflective tape on the object to be measured and point the tachometer’s integral light beam at it. There are ten reflective tape strips, and each strip measures 23 x 0.25 inches (584 x 6mm).

Digital StroboTach 115VAC/60Hz
The Digital StroboTach 115VAC/60Hz (461830) allows you to freeze motion and analyze rotating objects without contact. It checks and analyzes motion and speed by simply aiming and synchronizing its flash rate (FPM) with a rotating object — ideal for measuring the speed of moving gears, fans, pumps, motors, and other equipment used in general maintenance, production, quality control, or laboratories. Measurements are read on the four-digit LED display. High accuracy is maintained over a wide, dynamic range via exclusive microcomputer LSI circuit and crystal control time-base. It has a Flash/Speed Rate of 100 to 10,000 FPM/RPM with duty cycles from five to 30 minutes and one second sampling rate. It has a tripod mount for stationary use and operates on 115VAC/60Hz, coming complete with a six-foot (1.9m) power cord.


General Specifications
Circuit Custom LSI microprocessor based design
Display Reversible, 0.4" (10mm) 5-digit (99999 count) LCD display
Measurement units RPM (revolutions or rotations per minute)
Memory Recall Records/Recalls Max/Min/Last readings with memory push-button
Operating Temperature 32 to 122°F (0 to 50°C)
Operating Humidity < 80% RH
Power Supply Four 1.5V 'AA" batteries (UM-3 or equivalent)
Weight 0.66 lb. (300g)
Dimensions 8.5x2.6x1.5" (215x65x38mm)
Accessories Reflective tape and carrying case
Electrical Specifications
Measurement Range 5 to 99,999 RPM for the Tachometer, 100 to 100,000 FPM/RPM for the Stroboscope
Resolution 0.1 RPM (<1000 RPM) and 1 RPM (> 1000 RPM)
Accuracy ± (0.1% + 2 digits)
Sampling Time 1 second (> 60 RPM)
Photo Tachometer detection distance 2 to 6" (50 to 150mm) typical - Note: Detection distances up to 12" (300mm) are possible depending upon ambient light
Stroboscopic Flash rate 100 to 100,000 FPM (flashes per minute)
Stroboscopic Flash adjust range Range A: 100 to 1,000 FPM Range B: 1000 to 10,000 FPM Range C: 10,000 to 100,000 FPM
Stroboscopic Flash tube type High efficiency LED lamp
Stroboscopic Flash duration 60 to 1000 microseconds (approx. 16% of period)
Stroboscopic Flash Color Orange


Click here for product datasheet

    Product Images (click to enlarge)
    • Extech 461825 Combination Photo Tachometer/Stroboscope