I have taken the advice of multiple Creekers and purchased the http://superpid.com/ router speed controller. It took the company over two weeks to ship the device and is now in transit from Australia. I am in the planning phase of the installation and might be interested in putting the module inside my cabinet and installing a secondary RPM readout. The card has a output pulse for computer controlled CNC machines or secondary tacho readout. In my case I just want to be able to read the RPM without looking into a cabinet.
Does anyone know of a device that performs this function? I've done some searches on Google and most returns I am getting are from automotive applications.