Yes well technically it would have 12 probes 4 hot side, 4 cold side, 4 humidity probes. Like you could buy the thermometer with 4 probe ports, 8 probe ports, 12 ports etc... And up more for bigger breeders. Im using the word port bc in my head im thinkin usb port even tho i know theyre different.
And then each "probe port" would have 3 probes bundled together that plug into it. A red wire for hot, a cold wire for blue, and another color for humidity. The thing is like i said im not an engineer so i have no idea if 3 probe wires could be connected into one male part that could just plug into one of the female ports on the thermometer. And then each port would be numbered so that way you would read on the screen the stats corresponding to each port coming from each tub.
Sorry this is probably unrealistic and confusing lol... :/