This plugin is only supporting the Phidget InterfaceKit 8/8/8 (as you would have read in the manual). Since there's no standard for interfacing with such devices, I highly doubt you can attach anything else than a Phidgets but I may be wrong.
However, Phidgets claims that you have access to all variants of sensors, so yes, I think that's just a matter of the right calibration (or Factor formula in this case).
So let's start with the 8/8/8 first and then we'll see where it gets us
All of you who already own such a device, please raise your hand (I need some more testing
).