I am looking for a PI controller with the following specifications :

1. Command input : 0-10V dc
2. Pressure Transducer feedback : 0-10V dc
3. Output from unit : 0-10V rated to drive a load of atleast 1 K
4. Adjustable P & I parameters : Either by Pots or through a com port in PC.
5. Mounting : No restrictions
6. Power Supply : 24V dc preferred but can use other types like 230 V ac etc.

The output from this controller will actually go to a proprotional pressure relief valve and the command input will be generated by a PCI card, which in turn will depend on the pressure value required by the client.

I already have a simple home brewn solution that can do this, but client needs a commercial unit and hence the request. In fact I can make do with any general purpose PI module, as the control bandwith is very low at less than 5 Hz. Any suggestions ?