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Thread: Do they make a pool thermometer that will last years in sun?

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    Do they make a pool thermometer that will last years in sun?

    Do they make a good pool and spa thermometer that will last years in the sun and chlorine?

    I've bought about ten pool thermometers over the past few years, all from Leslies and Home Depot, and they all become unusable within a year or two:


    Can we buy or make our own more durable thermometer out of thermocouples perhaps?
    Silicon Valley, 38,500 gallons in-ground plaster; Sta-Rite System 3 Model S8M150, 259 sqft cartridge 25022-0203S + 191 sqft cartridge #25021-0202S = 450 sqft filter@0.28gpm/sqft = 125 gpm@50psi max. Three 220v Sta-Rite Max-e-Glas II pumps {AO Smith QC1102 1.0x1.65SF for filter + cleaner; SQ1152 1.5x1.47SF for spa jets; square 48Y flange}. 13 Fafco 12'x4' professionally installed "Revolution" solar heating panels + Raypak RP2100 P-R 405A-EP LPG 399,000/hour heater + Compool Lx3600 controller + Infinity 4000 automatic pool cover (120v 3/4 HP motor); both skimmers are NOT filtered & serve only as intake for 9-port water valves (aka cleaner heads) controlling fifteen Paramount PCC2000 3" self-cleaning jets with the optional Debris Containment Canister.

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    Mod Squad JohnT's Avatar
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    Re: Do they make a pool thermometer that will last years in

    Get a Pentair Inline Thermometer SL1DW
    and install it in your plumbing. If you can put them in the right places you can monitor several temps. I have on on my filter out andone on the solar out to see heat gain.

    If your spa is spillover type and doesn't have a suction line it won't work for that though.

    You'll see them priced fairly high online, but you can grab them cheaper on ebay now and then.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Do they make a pool thermometer that will last years in

    Quote Originally Posted by JohnT
    Get a Pentair Inline Thermometer SL1DW
    and install it in your plumbing. If you can put them in the right places you can monitor several temps. I have on on my filter out andone on the solar out to see heat gain.

    If your spa is spillover type and doesn't have a suction line it won't work for that though.

    You'll see them priced fairly high online, but you can grab them cheaper on ebay now and then.

    I've wanted one after my solar so I can see the temp difference. How do they install? I googled but there was no inst. instructions.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Mod Squad JohnT's Avatar
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    Re: Do they make a pool thermometer that will last years in

    Quote Originally Posted by bobby1017
    Quote Originally Posted by JohnT
    Get a Pentair Inline Thermometer SL1DW
    and install it in your plumbing. If you can put them in the right places you can monitor several temps. I have on on my filter out andone on the solar out to see heat gain.

    If your spa is spillover type and doesn't have a suction line it won't work for that though.

    You'll see them priced fairly high online, but you can grab them cheaper on ebay now and then.

    I've wanted one after my solar so I can see the temp difference. How do they install? I googled but there was no inst. instructions.
    You get a T fitting which is 1-1/2" or 2" with a 1" (I think) threaded port ast the 90 degree port. The nylon well screws into the threaded port, and the thermometer goes into the well.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Join Date
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    Re: Do they make a pool thermometer that will last years in

    I see, I thought maybee you just drilled a holes like some of the other temp mounts. thank you.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Re: Do they make a pool thermometer that will last years in

    Quote Originally Posted by JohnT
    You get a T fitting which is 1-1/2" or 2" with a 1" (I think) threaded port ast the 90 degree port.
    Yikes. I'm in the middle of moving my pumps. I wonder if I should add that fitting now, closed off, for later use.
    Silicon Valley, 38,500 gallons in-ground plaster; Sta-Rite System 3 Model S8M150, 259 sqft cartridge 25022-0203S + 191 sqft cartridge #25021-0202S = 450 sqft filter@0.28gpm/sqft = 125 gpm@50psi max. Three 220v Sta-Rite Max-e-Glas II pumps {AO Smith QC1102 1.0x1.65SF for filter + cleaner; SQ1152 1.5x1.47SF for spa jets; square 48Y flange}. 13 Fafco 12'x4' professionally installed "Revolution" solar heating panels + Raypak RP2100 P-R 405A-EP LPG 399,000/hour heater + Compool Lx3600 controller + Infinity 4000 automatic pool cover (120v 3/4 HP motor); both skimmers are NOT filtered & serve only as intake for 9-port water valves (aka cleaner heads) controlling fifteen Paramount PCC2000 3" self-cleaning jets with the optional Debris Containment Canister.

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    Re: Do they make a pool thermometer that will last years in

    I picked up this $15 waterproof electronic thermometer (-40F to 450F) which I will see if it floats or sinks when tethered in the pool.
    Silicon Valley, 38,500 gallons in-ground plaster; Sta-Rite System 3 Model S8M150, 259 sqft cartridge 25022-0203S + 191 sqft cartridge #25021-0202S = 450 sqft filter@0.28gpm/sqft = 125 gpm@50psi max. Three 220v Sta-Rite Max-e-Glas II pumps {AO Smith QC1102 1.0x1.65SF for filter + cleaner; SQ1152 1.5x1.47SF for spa jets; square 48Y flange}. 13 Fafco 12'x4' professionally installed "Revolution" solar heating panels + Raypak RP2100 P-R 405A-EP LPG 399,000/hour heater + Compool Lx3600 controller + Infinity 4000 automatic pool cover (120v 3/4 HP motor); both skimmers are NOT filtered & serve only as intake for 9-port water valves (aka cleaner heads) controlling fifteen Paramount PCC2000 3" self-cleaning jets with the optional Debris Containment Canister.

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    Re: Do they make a pool thermometer that will last years in

    Bump... I just want one that ties to the side of the pool.

    I used to have a metal one that was great and lasted years. Now all the ones I see at the pool place are plastic and I end up returning them because they all float. I don't want it to float.

    Does anyone know of any good ones that will last, are accurate, and maybe metal?

    I did see some wireless ones that display the temp inside your house, but I'm sure that isn't too reliable.

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