Phidgets.com

We have come to know that there are two devices for duplicating the knobs, which are Rotation Sensor and USB Rotation encoder.

USB Rotation encoder does support PRESS operation but Rotation sensor doesn't.

Is there any device to duplicate Knob with PRESS and that can be connected through PhidgetInterfaceKit?

You would have to wire up your own. CTS makes some potentiometers with built in switches. You can buy some models from digikey in low volume.

http://www.ctscorp.com/components/Datasheets/270.pdf

Chester