Remote temperature probe and wiring

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Please could you advise if there is an available product from Tado for either a remote temperature probe that can be located within a wetroom or an IP rated Wireless Thermostat. The wireless thermostat cannot be placed in my desired location due to the IP rating and electrical safety zones. If there is no product available please could you advise if there is a terminal connection within the wireless thermostats that can have a remote temperature probe from a different manufacturer.

Also can you advise what the terminals Analogue/Digital (A - +) are used for. Could an Extra Low Voltage pair be used in the same way that the 230V supply switches?