The old humidifier died a couple of years ago. Did a great job until then. What is today\’s equivalent model number please?
Whole House furnace mount bypass model 302192 is the old one.
The 600M would be closest to what you were using on your old control; a simple 2-wire setup with the % display. The 600 has a newer digital display with an outside temperature sensor that will automatically adjust the humidity level according to the temperature outside.
I would talk to a heating and cooling contractor about either unit for your home. They can assist you further.