[Adi]

I'm about to get a DD5 and was wondering if anyone had put the bulb type sensors straight into the water, without coating them in anything?

[jamesavery22]

I wouldnt do the bulb sensors, do the flat ones. The bulb ones have bare metal exposed if you look close.
just try it though, if you have an extra PSU hook the digidoc up to it and turn the psu on with the wire trick and put a sensor in a cup of water for a few days. make sure the probe doesnt fail and/or corrode or something like that. Im pretty sure those things are sealed though. The orangish plastic that surrounds the metal contact looks air tight, even to the wire's insulation.