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HD Backlight Screen
The LCD screen will display the measurement reminder symbol, battery power reminder, USB connection prompt, numerical display area, memory mark, unit display area, numerical lock, CONTACT symbol, maximum value, minimum value and PHOTO symbol.
Wide Application
The rpm tachometer is widely used to measure the blade speed of fans and exhaust fans, the motor speed of cars and ships, the gear speed of paper machines, the pulley speed of motors, the transmission line speed of assembly lines, the motor speed of washing machines, etc.
Button Function
POWER Key/TEST Key:
- Press this button to turn on the digital tachometer.
- Press and hold this button, and the tachometer starts to measure.
- After the measurement is released, the instrument will lock the measured value, and the value will not change after being locked.
BACKLIGHT Key/UNIT Key:
- Short press to switch the unit RPM(revolution/minute), Hz(Hertz), m/min(meter/minute) and ft/min(feet per minute).
- Long press to turn on or off the screen backlight.
MEM Key:
- View the currently measured lock value (HOLD), maximum value (MAX) and minimum value (MIN).
- View the locked value (MEM HOLD), maximum value (MEM MAX) and minimum value (MEM MIN) of the last measurement before the instrument is turned off.
Battery Powered and Automatic Shutdown
The meter is powered by 3pcs AAA batteries (included in the package), and the battery box symbol in the upper right corner of the screen prompts you for the battery level.
SST316
2025-08-15 16:05:40
I am impressed with this tachometer. It has simple instructions, works both mechanically and optically and comes with everything you need to use it. Mine came with the contact attachment installed and there were no instructions for removing it. There are two small Phillips head screws which you remove and then two small plastic clips need to be flexed to remove the contact attachment. I found that the screws were not necessary to hold the attachment in place when I was doing measurements, although it is probably a good idea to have the screws in there.I first tried measuring the speed of a Dremel. I used the concave rubber attachment with a convex grinding tool. It was a little bit awkward to hold the dremel tight to the tach but I could manage to take measurements. The tach measures as long as you hold the test button and it keeps track of maximum, minimum measured rpm. I started at the lowest speed which is around 5,000 rpm and them went all the way to the maximum which is around 30,000 rpm. This speed is too high for the tach and it displays HI. It did get a little warm too. By adjusting the speed I got a reading close to the maximum of the tach, which is 19,999 rpm.Next I tried using the optical, non-contact method. I attached a small, 1/2 inch piece of the supplied reflective tape to a polisher. I changed the measuring mode to P, photo and took some measurements. There is a laser in the tach and when pointed at the reflective tape it measures the rpm. It worked great at both low speeds, 300 rpm and high speed, 3,000 rpm. I was a little worried about the tape flying off but it stayed put. Now I know what rpm the numbers on the polisher mean. I plan to use this on my outboard for setting the idle rpm by putting some reflective tape on the flywheel.
jwilli
2025-08-04 17:51:38
This unit is very far off on calibration and no way to correct it. at 50fpm it reads 43fpm. at 300fpm it reads 250fpm
THOMAS F ZERAFA
2025-07-11 10:12:29
happy with transaction. received what I wanted
Brian R.
2025-05-19 18:35:59
You must have the exact shaft size adapter on the unit that matches perfectly to the device being measured.
william twigg
2025-03-23 19:24:53
It was way off in accuracy. Very disappointing.
Muy buen producto
2025-01-30 11:36:54
Muy buen producto
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