Non-contact tachometerThe tachometer is a digital tachometer with stable performance, high reliability and high security. High and low power of laser Alternative for near and far distance measurement and eye protection. MultifunctionNon-contact measurement can solve measurement problems of some inspected objects that are easy to deform. With a wide measuring range from 10 to 99999 rpm and high accuracy. Supports autoranging, auto power off, data retention, overrange indication, low battery indication and other functions Accurate Measurement With photodiode and laser tube sensor, refresh rate: one second (120rpm or more) - 7 seconds (depending on the speed), non-contact speed measurement error 0.04% + 2dgt, effective measurement distance 50mm-200mm. Automatically save the maximum value and minimum value LCD backlitUsing the principle of laser scattering, the laser has high brightness and large volume, which is convenient for observation, improves the speedometer sensing performance and ensures the precision. Large backlit LCD screen to enable and read measurements in low light conditions. Application It is an essential instrument for 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 aimed at people's eyes, and the distance should be measured when measuring the speed should not be less than 50mm to avoid fast rotating objects touching the tachometer and damaging the tachometer or injuring people. Stop the rotating test specimen Cut A Piece Of Reflective Paper (About 10mm*10mm) 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 reception window is between 50 and 200 Press the power button to turn on the tachometer and enter the measuring speed function by default. The laser is aimed at the reflective paper on the object to be measured, and the vertical angle to the reflective paper is no more than 30 Start the test object. The Gauge Displays The Measured RPM