I am searching for vendors offering electronic valve linearization, and am hoping for suggestions that I haven't been able to find via google searches. Continue reading if you want more details.
An example of an adjustable mechanical cam on a valve would be Maxon's Micro-Ratio valves. I am looking for vendor's that can accomplish a similar thing electronically by mimicing an adjustable cam, i.e. have10-20 potentiometers or a keypad to enter 10-20 points that would re-scale a 4-20mA signal sent to a valve actuator so that the original signal was linear with respect to flow through the valve. I am searching for solutions less expensive than existing servo parallel positioning systems that cost in the thousands of US$, for example a Honeywell R7999 Fuel Air Ratio Controller. So far my searches via google have turned up several vendors offering electronic linearization, but their offerings are packaged with other electronics (for instance fuel flow totalizers), which I don't want or need. Thanks in advance for any assistance.