Digital Tachometer, 50-19999 RPM Contact Tachometer, 100 Groups Data Store Handheld Speed Meter with Backlight, Max/Min/AVG RPM Rotation Speed Gauge, PT6208A (Batteries Included)

Works great, I also purchased the manual operated contact model, which also works very well. Quite handy to have around the shop!

Had to read instruction to figure it about after that worked great

Works great

A newly-installed (electronic pulse driven) tachometer proved to be wildly inaccurate. This product allowed me easily to calibrate it. (1) Set the engine to a comfortable RPM above idle. (2) Check actual RPM at the crankshaft pulley. (3) Adjust the tach to match. (4) Repeat to confirm settings.

Right out of the box I tried to test it on my cordless drill. Used the shiny tape and everything, it either wouldn't read at all, or would say my drill was running at 87,000 rpm when it was on low speed. I thought maybe light was interfering , but I went into a totally dark room and got the same- drill was either reading at 90000 or 55000 or 0 or about 1 of every ten tries, it would read correctly at 400 rpm. No worky worky, sending back. Bought this to test my CNC spindle speed, and it won't work at all.

We have irrigation gear heads running our wells and this is absolutely perfect. Reads immediately and is incredibly accurate.

The 6" wheel that came with the unit is not a true 6 inches. It is approximately 6 1/8 inches. That throws the measurement off approximately 15 to 20FPM when I am attempting to read 600FPM. If I put a true 6inch wheel on the unit it will read correctly. You need to send the correct wheel with the unit.

The instructions do not tell you to use the small wheel for ft/min mode. Otherwise it is great!