Author Topic: thermometer for Pool/Spa temperature monitoring???  (Read 12461 times)

Offline r-noxious

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #15 on: February 07, 2017, 05:17:10 pm »
I use a solar panel and battery combo for my pool sensors. Plenty of power.

Offline Mike Yeager

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #16 on: February 07, 2017, 06:30:53 pm »
Have been thinking about this as well. A small panel and a 6v battery should run everything I have out there that's not line voltage.

Offline jroberts

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #17 on: October 28, 2018, 03:14:53 pm »
I know this is an old thread, but I have been watching and looking for this for a long time.  I cannot believe that there isn't a z-wave thermometer that would work in a hot tub yet...  I just want to monitor the temperature, not control anything.  Has anyone found anything?

Offline Mike Yeager

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #18 on: October 28, 2018, 09:16:13 pm »
Best Z-Wave solution going seems to be a Fibaro door sensor with an attached DS18B20. They're actually designed to be used as a temperature sensor...

Offline tomtcom

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #19 on: October 28, 2018, 09:27:21 pm »
@Mike, thanks for the idea. I too wish there was a device already set up and designed for pools. I think pool zwave tech is severely behind the times.

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Offline jroberts

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #20 on: October 28, 2018, 10:08:58 pm »
So, I'm not sure how you would connect the DS18B20 or whatever to the door sensor...  Could you just vacuum seal the door sensor into a plastic bag and throw it in the hot tub?  OR maybe use the Fibaro motion sensor?  That way, if someone opened the hot tub cover you would get the alarm. 

Offline Mike Yeager

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #21 on: October 29, 2018, 11:15:02 am »
The Fibaro door sensor has a terminal strip at one end for connecting the DS18B20. I got a couple of them off EBay that are waterproof and I made a sensor that screwed into my pump housing. I used a nylon plug and drilled a hole in it that the wires would pass through. I sealed it up with JB-Weld and coated the sensor probe for good measure. I suppose you could just seal it up in a ziploc bag, but it's $40 you're gambling with. Better to find a drain plug in the filter basket or pump you could replace. I'd still wrap the Fibaro sensor (I have mine in a PVC box) to protect it though...

As for Z-Wave needing a device for pool temp, it's not a common need like a light switch. Be happy that there's an easy way to get it done at all. There are WiFi pool thermometers out there, and I believe 1 or 2 that are Z-Wave, but the reviews aren't that great....

Offline tomtcom

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #22 on: October 29, 2018, 02:00:05 pm »
Thanks Mike. Any pics you could share of your handy work?

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Offline Mike Yeager

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #23 on: October 29, 2018, 07:39:20 pm »
I'm not sure I kept any but I can look. If not, I can take a few. Really not much to it though...

Offline icare

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #24 on: November 04, 2018, 03:56:58 am »
I succesfully use the following sensor:
https://store.brewpi.com/threaded-onewire-temperature-sensor-npt-1-2
In connection with a NodeMCU ESP8266 using GET command to get into Vera.
Concept used for pool pump control (PVC T-1/2" NPT) as well as CH floorheating pump control.

Offline Mike Yeager

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #25 on: November 05, 2018, 10:57:24 am »
Here's the original sensor I put together. This one was nothing more than a thermistor slipped into a piece of copper tubing. I eventually covered the copper tubing with a thin coat of JB Weld. This sensor is still in use today on my dad's pool.

Offline Mike Yeager

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #26 on: November 05, 2018, 11:02:03 am »
I later refined this by using a DS18B20 waterproof sensor I picked up on EBay. I got 5 of them for something like 4 bucks or so. The build was the same basic thing. I drilled a hole in the pipe plug big enough to pull the wires through, put a dab of JB Weld on the end of the sensor that seated into the plug and pulled it in. Then I put a light coat of JB-Weld oover the body of the sensor. The only purpose of the JB-Weld over the sensor is to prevent corrosion. I have a salt water pool. The original copper sensor would have been eaten alive fairly quick. The DS18B20 is in a stainless steel casing, but I coated it anyhow. Doesn't affect the readings...

Offline tomtcom

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #27 on: November 05, 2018, 01:51:01 pm »
Thanks Mike. I guess somehow I was thinking you had them directly into the pool. I didn't think about the tubing but I appreciate the ideas and pictures.

By chance did you ever find anything for the pressure gauge? I have a salt water pool tool and always wanted the pressure gauge monitored so I would see when to clean the filter.

Offline Mike Yeager

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #28 on: November 05, 2018, 10:18:06 pm »
I found several options for pressure, but they're all rather expensive and you have to come up with your own method of getting the data into your system. If you only want to know when the pressure exceeds a given amount, that's a lot easier and quite a bit cheaper. Not very informative though. How much work are you willing to put in and what's your budget? I just decided to walk out and check the pressure gauge on the filter every few weeks...

Offline tomtcom

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Re: thermometer for Pool/Spa temperature monitoring???
« Reply #29 on: November 06, 2018, 07:33:50 am »
I found several options for pressure, but they're all rather expensive and you have to come up with your own method of getting the data into your system. If you only want to know when the pressure exceeds a given amount, that's a lot easier and quite a bit cheaper. Not very informative though. How much work are you willing to put in and what's your budget? I just decided to walk out and check the pressure gauge on the filter every few weeks...
:) I can walk out there I just wanted the ability to graph it in datamine so I can see the history and changes over time.

With datamine I can add variables with other devices so the graph shows outside temp, setpoint, current temperature, and mode state.

My ideas for the pool would be outside temp, pressure, and water temp overlayed so I could see the effects and change in the pool. Helps me spot correlations.

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