RPM sensor

Does anyone know of a source of a rpm sensor that can be used on the small shaft end of an advanced dc motor. I have searched the internet and can’t come up with one at a reasonable price.

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i think there’s one on the myers NMG…

maybe call advanced DC, they sell motors with RPM sensors, I’m sure they know what one you need.

You know - I remember some time ago that there used to be a Tachometer on the mkt that you could use on a Diesel engine. It had a sensor that was triggered by the blades on the alternator.
I went looking for it for you and didn’t really find it - but found this link that may be of some use.