Extech's Mini Laser Photo Tachometer, Model 461920, provides non-contact RPM and Revolution count measurements. The laser pointer beam provides accurate long distance measurements for photo tachometer measurements. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
This manual provides instructions for the Extech Model 461920 Mini Laser Photo Tachometer, a device designed for non-contact RPM and revolution count measurements. It features a laser pointer for accurate long-distance readings and includes a memory function to store maximum, minimum, and last values.
| Display | 5 digit LCD display |
|---|---|
| Laser Class | Class 2 laser < 1mW |
| Wavelength | 630 to 670nm |
| Detecting Distance | 2 to 20" (50 to 500 mm) |
| Sampling Time | 0.5sec (over 120 rpm) |
| Tachometer Accuracy | ± (0.05% + 1d) |
| Power Supply | Internal 9V battery or external AC Adaptor (6 to 9VDC) |
| Weight | 5.3oz. (151g) |
| Size | 6.3x2.3x1.6" (160x58x39 mm) |
An appropriately sized square piece of reflective tape should be 0.5"/12mm.
Point the meter toward the device under test at a distance of 2" to 20" (50 to 500mm).
With the meter OFF, press the MEM (memory) button to recall the MAX, MIN and LAST rpm values or the last count.