【Non-contact Tachometer】The tachometer is a digital tachometer with stable performance, high reliability and high safety. High and low laser power Alternative for near and far distance measurement and eye protection. 【Multi-function】Non-contact measurement can solve the measurement problems of some inspected objects that are easy to deform. With a wide measuring range of 10 to 99999 rpm and high accuracy. Supports auto-ranging, auto-power-off, data retention, over-range indication, low battery indication and other functions (depending on the speed), non-contact speed measurement error 0.04% + 2dgt, effective measuring distance 50mm-200mm. Automatically record the maximum and minimum values 【Backlit LCD】Using the principle of laser scattering, the laser has high brightness and large volume, which is convenient for observation, improves the detection performance of the speedometer and ensures accuracy. Large backlit LCD display to enable and read measurements in low light conditions. 【Application】 It is an essential instrument for the mechanical industry to measure motor speed, line speed or frequency. Commonly used in motors, electric fans, paper, plastics, chemical fibers, washing machines, cars, airplanes, ships, etc. The laser of the tachometer should not be directed towards people's eyes, and the distance to be measured when measuring speed should not be less than 50 mm to prevent rapidly rotating objects from touching the tachometer and damaging the tachometer or injuring people. Stop the rotating test piece Cut a piece of reflective paper (about 10 mm * 10 mm) and stick it on the object to be tested Fix the tachometer in a stable position so that the distance between the laser emission of the tachometer and the receiving window is between 50 and 200 Press the power button to turn on the tachometer and enter the function of Default measuring speed. The laser is aimed at the reflective paper on the object to be measured, and the vertical angle with the reflective paper is not greater than 30° Start the test object. The gauge displays the measured RPM