NEIKO 20713A Digital Tachometer, Noncontact Laser Photo Sensor with 2.5 to 99,999 RPM Accuracy, RPM Gauge Marker with Batteries Included

Tachometer arrived as described. I went to use it on a Kawasaki lawn mower engine. Unfortunately the reflective tape did not stick well to the flywheel screen, it was dirty so I understand why. I put a 1/4" by 1/2" dab of white paint on it and the tach worked perfectly. Great little tach for the money

Perfect for lab testing for things that rotate and you need to get an overall decent reading of RPM, works well and functions even better. Easy to use and to hold and read. Good buy overall.

Works as intended, accuracy is kinda questionable. It's easy to use. Put the reflective tape on whatever rotating part you wanna measure the RPM's on then power on said thing and hit the button on the tachometer aiming at the reflective tape while the object is in motion. The only reason I'm giving it 4 stars is because sometimes my initial reading vs my second or third reading will be a little different, this is on a static device ie, the RPM's don't change.

I bought this particular tachometer, because I own several tools made by Neiko, and they're quality tools. I used it to test my new 1.5kw spindle motor and vfd. It's important to use a small piece of the reflective tape on whatever you're testing. The tape wasn't sticking well to the spindle motor, because of the packing grease. Even after cleaning the collet chuck, it came off. So, I put a piece of non reflective tape on the chuck, and a small piece of the included reflective tape on top of it, and it's still holding. It was with the Neiko tachometer that I discovered that my new vfd display wasn't defaulted to rpms. That sounds like something that would be obvious, but my vfd reads out "r" before frequency, not rpms, so I thought r240 was 24000 rpms; it was a frequency of 240 (go figure). When I realized what was going on, I was able to correct the vfd programming so that it defaulted to rpm readout. I found that the vfd was correct to minus 35-50 rpms. The Neiko reading was rock solid, and consistent through 6 different spindle speeds. I didn't find a difference in reading based on distance from the source; the reading was the same whether taken 4" away, or 4' away. It came with a battery, which worked. But, I prefer a good alkaline battery over a mercury battery, so I'm storing it with a 9v alkaline. I do not store my battery operated tools with batteries inserted; I store the batteries with them, but not inserted. The storage pouch is nice. I'm storing the tachometer in the cnc table drawer. The neiko tachometer came with a zippered pouch, quite a bit of reflective tape (I'm only using about 3/16"), a 9v battery, and instructions.

Inexpensive and it works. I recently rebuilt the vtwin for my tractor and wanted to confirm the governor was set right. Small price to pay for knowing its right.

Was not in a condition to work right out of the box. The device was still in shrink wrap so it was not a return, but it could not provide a reading first time I tried to use it. I work in optics and could tell right away the problem was with the lens assembly because it was loose and out of position. I was able to fix it quickly and then it worked like a charm. If the initial quality was high I would give it four stars. In case you take the plunge and also get a lemon, here is what to do: Remove the battery cover. There are two small black screws recessed in holes that need to be removed; use a skinny Phillips head screwdriver to remove them. At the opposite end there are two more screws also recessed. When those are out remove the top cover. The two push buttons may fall off their switches but don't worry, just set them aside. On the top of the circuit board near the lens you will see a clear photodiode; mine was bent at a severe angle. If necessary use your fingers to bend it so it is pointing straight forward toward the lens- make sure the photodiode does not bend down toward the circuit board because the light emitter is mounted on the underside of the board and you don't want to block the light. The lens is biconvex so it doesn't matter which side is which; it sits loosely inside a plastic ring. There is a larger plastic spacer that holds the lens firmly within its plastic ring- they don't snap together tightly but when you have them positioned correctly they will stay together well enough to place them together as a unit in the tachometer. The lens end of the assembly goes toward the photodiode. There is a rim on the spacer that fits in a groove at the very front of the tachometer and the rim has an oval shape so the assembly needs to be rotated so that it nestles down in the groove. Once the assembly is in place you can close the tachometer, but make sure the switch buttons are seated on top of the two switches (the Test and Memory switches) and angled at a 45 degree angle so they'll match up to the holes in the tachometer cover. Then you can press the cover in place over the switches and put the four screws back. It sounds awfully complicated but it really only took five minutes to fix and then it worked perfectly. I also can verify its accuracy because I was using a synchronous motor controlled by a pulse generator that outputs exactly 2500 rpm and that is what I got from the tachometer. My only quibble is that the device displayed 0 rpm when it actually wasn't getting a signal; I would prefer that it have an indicator of no signal.

this is the best purchase ever for a small engine tach.

Came w/ a new but dead 9v battery, wasn’t reading at all but would light up the display. Replace the 9v battery and still gave inaccurate readings that jumped around. Was cheap and I only needed it for one day, but unfortunately I wasn’t able to get the job done because it was inconsistent and I can’t trust the readings. Wish there were better reviews, I would have spent a little more money to have something reliable.

Works great

Muy fácil de usar, bastante preciso y portable

Very cheap materials. Bad quality

cumple con todo lo que dice y muy util para la industria

A great tool. Accurate and easy to use. The reflective tape could have a little more adhesive. Make sure you clean the area very well before trying to place the reflective tape.