08-28-2012, 04:03 AM
Any handheld Infra red or laser tacho would do the job, I've had a few over the years they didn't used to be cheap, but are all over Ebay now for less than £10 they often require a piece of reflective tape to be attached to the spindle.
Rick
Rick
Whatever it is, do it today, Tomorrow may not be an option and regret outlasts fatigue.