we build high temp vacuum furnaces. I have an order in-house now that requires a Yokagawa UP-550 controller and so we need a driver. I also need to find what programmable temperature controllers have drivers already developed. We use Eurotherm (2404/2604/2704), Honeywell(UDC-3300/UDC-2300/HC-900),and Yokagawa instruments(UT-350/UT-550/Up-550/UP-750). We also use Mitsubishi PLC's(FX2n) that we need drivers for. Also use Pfieffer and Granville Phillips vacuum controllers that need drivers.