Akozon -2234C+ Non- Digital LCD Photo Tachometer Mini RPM Tester Meter

Check the calibration by strobing an LED light or a fluorescent tube; mine was spot on and held steady at either 3600 or 7200 which is a multiple of 60 cycle incoming. When you use the tape take a black magic marker and blacken an area around the tape and the tach will lock right in.Good value for money IMHO.

Perfect for measuring motor RPMs. One of the kids must have gotten ahold of it, because we found reflective stickers on the ceiling fan! I use it to measure hoverboard motor's RPMs to get theoretical maximum speed readings.

Takes 9V battery and does not ship with one, so you have to order one separately, and 9V are more expensive these days than AA or AAA. Other brands / models use those.However, I bought another unit that runs on AA batteries and it was not nearly as accurate or repeatable as this one.

To be honest, I had few expectations of this unit. I needed to get some idea of the actual spindle speed range of a couple of routers. One had the supposed range printed on the label and the other was a mystery. Often, I'll go to "hazard fright" for this type of device, but in this case, their unit was twice as much money and the reviews were poor. So, I took a shot with this unit.Obviously, I don't have a perfect calibration, on the known unit, the range was supposedly 16,000 rpm to 26,000 rpm. At the minimum speed, this tach measured 16,245 and it was rock steady. At the maximum, it measured 25,800, and it was again rock steady. Since I only need to know within +/- 500 rpm or so, this was plenty good, and I consider the unit be sufficiently accurate for my purposes. Obviously, a true calibration would enable a better answer.

Worked well and my equipment was dead on after the overhaul. I haven't attempted to calibrate with a known frequency generator.

It is a non contact RPM measuring device. The beginning of the promo write up tells you the various rotation subject one can measure. This includes rotation automobile tires, fans and the distant likes! I didn't read any further. You should! After all one must fasten a shining sticker to the subject in order to measure it's rotational turns. So for me it is useless. I didn't send it back because later reading the FULL description I learned that one has to use the enclosed shiny strip. Truth in advertising should have stated it at the beginning of the description.

Obviously open box represented as new. Tested ok but when i buy new i expect pristine condition.

Works well and compares equivalent RPM on my milling machine.

mido las rpms de un router cnc y tiene poca variacin con lo que muestra el vfd

Pour évaluer une rotation de moteur de bateau