Best Thermowell(s) for DS18B20 digital temperature sensor?

[PhiDeck]

Recommendations, please.

Also, what material, if any, should fill the small gap between the thermowell and the sensor probe?

(West-Central Florida)

 

[Bama Rambler]

It would help if you told us what you were installing this into.
And if you're buying the waterproof probe or if you're using the to-92 package and rolling your own.

Having said that, I'd go with the stainless steel waterproof probe and pick up a plastic cable gland and insert the probe into it unless there's some reason not to.

They also make units that come with a ½" threaded gland.

 

[PhiDeck]

PVC: 1½ in. x ½ in. NPT

 

[Bama Rambler]

I'd still try a cable gland. Even though it's not directly in the stream, it'll sense the temp as well as it would in a thermowell.

If you want a thermowell, just search for a ½" NPT stainless steel thermowell, and pick one the length you want (a 2" or 2½" should do it). Standard thermowells are bored for ¼" stems (.260") so that sensor should fit since it's a little less than ¼".

All this assumes that you're not installing it in acid service.