How should I add waterproof temp sensors to pool plumbing??

johnny2678

Active member
Nov 16, 2015
41
Lakewood Ranch, FL
I've just spent a few hours rigging up some waterproof DS18B20 temp sensors to a raspberry pi I had sitting around and now I have it connected and sending data to my SmartThings account. Pretty cool!

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Problem is these temps are actually just in my office... not sure how to actually tap into my plumbing without screwing something up. Anyone have experience with this?

My Google skills have only turned up someone who did this using a 3-D printer, but that's not an option for me.

https://www.hackster.io/mmackes/pool-controller-8dfa69

I was taking a look at my plumbing this morning and I noticed a couple of options that could work...

This hose is taking air from the top of my filter canister and injecting it into the return. Looks like there's a seat washer that's held in place by a clamp. Anyone know where to buy something like this?
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Or this is like a threaded T piece from my intelliPh system clamped on to the return. I guess this could work also if I can find a way to put the temp sensor into a half-inch male threaded piece.
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Just curious if anyone has ideas. I can see adding a pH sensor and/or an ORP sensor down the line to possibly help fine-tune the chemicals with alerts or notifications. Just having fun with it.




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rphpool

Well-known member
Mar 4, 2015
715
Sugar Land , TX
Mine are held in place like your top picture. You can buy the clamp system from pool store. Really is as simple as drill hole , insert probe, secure clamp.
 

JamesW

TFP Expert
Mar 2, 2011
28,209
Hayward, Pentair and Jandy all sell 10k thermistors made to mount inline.

You have to make sure that they will work with your equipment.

Hayward / Goldline GLX-PC-12-KIT Temperature Sensor Kit includes 15 foot leads and a hose clamp. This kit requires a 5/16 inch hole for the sensor

Pentair 520272. Jandy 7786.

Sensor comes with oring. Drill hole, insert probe, clamp in place.
 

JamesW

TFP Expert
Mar 2, 2011
28,209
You could also use a bulb well to insert your current sensors. Bulb well threads in and bulb goes inside.

Probably have to use a T and reducers to have somewhere to insert the bulb well.

Saddle tees and Clamp-It saddles

You can use a saddle fitting to create a place to install a bulb well.
 

johnny2678

Active member
Nov 16, 2015
41
Lakewood Ranch, FL
Mine are held in place like your top picture. You can buy the clamp system from pool store. Really is as simple as drill hole , insert probe, secure clamp.

Thanks! Have you done this with the DS18b20 sensors specifically? Did you find the pool store clamps made a good enough seal or did you have to add something else?


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johnny2678

Active member
Nov 16, 2015
41
Lakewood Ranch, FL
Thanks Kara is, the sensors are waterproof.

Thinking of going with this 2-pack that comes with gaskets/ saddle clamps and filling in any gaps with Marine Epoxy.

What do you think?


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