Pentair SL1DW inline thermometer

Jun 14, 2018
132
Long Island NY
I would like to install two of these thermometers into the inlet/outlet piping of my heat pump. It appears that the tip of thermometer gets pushed through the nylon insert and sits into the plastic well. The long end of the thermometer is round and the hole in the nylon nut is square and requires some force to seat it. By doing so, there is no direct water contact on the thermometer tip. Is this designed that way so the heat transfer from the plastic tube is enough to give an accurate reading on the thermometer?
 

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Is this designed that way so the heat transfer from the plastic tube is enough to give an accurate reading on the thermometer?

It is supposed to. I have not seen anyone here mention using them.

Pentair sells them with a nylon well and a brass well. I woudl think the brass may have better heat transfer then nylon but be more expensive.


Let us know how it works for you and how its reading compares with the heater temperature displayed.