I use a Qubino Z-Wave Plus On Off Thermostat Module ZMNHID3 and temp sensor for my bathroom hot water recirculation system and it works great.
the stock sensor worked strapped to the outside of the water line but I upgraded it to this one for inline with the water brewpi temp sensor attached to the Qubino.
Qubino DH not my work I just edited it to work with Hubitat it was just over the 63000 character limit so had to put it on GitHub
