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Works much better then more expensive units. The trick seems to be to make the shaft that you like to measure needs to be black and smooth. I use heat shrink and then a little square of the included reflective tape on top of the heat shrink shaft and it read the rpm flawlessly.
Verified purchase: Yes | Condition: New
Works better than I would of thought.
Verified purchase: Yes | Condition: New
It doesn’t work at all I wouldn’t recommend this to anybody
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It did the job for me.
Verified purchase: Yes | Condition: New
Used it to measure wheel speed up to 20,000 rpm.
Verified purchase: Yes | Condition: New