While RUTX will be able to see other Bluetooth devices, however pairing in this instance does not work exactly as you would expect. from RUTX perspective it is more like a "registration" of the device from which it would register broadcasted information. In other words while RUTX is listening to the information sent from "paired" BT device, said device does not see RUTX as paired to it.
Another thing is actual Frame format, RUTX is able to parse information received Blue PUCK and Blue COIN since it is being transmitted in particular frame format, but anything else, even if you would be able to receive it, it will not be readable.
So in short, without having custom bluetooth feature on the router, most likely you will not able to use it for anything else than currently supported BLE4.0 sensors.