This specific model is a 230V single-phase component

Where should I mount this probe for the best accuracy

reducing scale buildup inside the humidifier housing

When installing this Barber Colman valve

While technically possible if specifications match

Maxon 200SMA21AA11BB11A0 Gas Valve 322027-701 This specific model is aThe Maxon 200SMA21AA11BB11A0 is a heavy duty 2 inch ANSI threaded gas valve designed for high capacity industrial burner systems. Featuring a standard port flow configuration and a normally open 2 way operation, this cast iron gas shut off valve is built for general purpose applications where reliability is non negotiable. The unit utilizes Buna body O rings and a bumper for superior sealing performance. With 115Vac 60Hz solenoid and motor voltages,