I just read a bit more on the Brewer's Hardware site regarding products that they have for sale. The offer three different products.
1. They have Temperature Sensors that have stainless steel ends. These would be used instead of the Temperature Probe that comes with the Love Controller. However, these would be used with a fitting that would allow you to insert the probe through stainless, for example, to monitor wort temperature. These require the use of a bulkhead or fitting that would not leak. The cost is $13 - $16.
2. They also offer Temperature Probe Ends that do not contain any wiring or electronics. These would be used with the temperature probe that comes with your Love Controller. Like the product above, these would require a bulkhead or compressing fitting to go through the wall of your kettle, for example. Your temperature probe would fit inside this end to be used for monitor temperature. Prices from these range from $3.00 to $8.00 depending on the length desired.
3. The third product is a Thermowell. This would house the temperature probe that comes with your Love Controller. They are all stainless, sealed on one end, with a slightly wider end on the open end. These are similar to the Temperature Probe Ends, described above, and are a bit more expensive -- starting at $14 and going up for the longer size.
I have the Thermowell (Option 3) not the Temperature Probe End (Option 2). I would think that you could get the Temperature Probe Ends to work for you too. The major difference between these two is that I think the thermowell is designed to be used with carboy bungs, etc, while the Temperature Probe end is designed to be fit into a compression fitting making the installation semi-permanent.
I hope that this helps.