UTH question

[Vypyrz]

is there a better way to mount the probe and UTH to get rid of the gap?

thanks-

You can also make a base to mount the probe and heater to, and then set the enclosure on top of it. You can make them out of wood, melamine, or polystyrene insulation.
Here is how I did it with melamine:

Routing a channel into the wood that is just deep enough so that the probe is slightly taller than the channel:





Mounting the probe into the channel:



Mount the UTH over the probe:



And here are a couple of photos of how I do it using polystyrene insulation. You can use a screwdriver or something to press an indention into it for the probe to lay in, tape the UTH over that, then set the enclosure on it.



Here, you can see part of the UTH base sticking out from under the tub:



I used this set-up to keep my tubs temporarily heated in a hotel room during our hurricane evacuation last year. 1 Johnson thermostat, 3 UTH's, 6 tubs...