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Thread: solar gl 235 sensor placement?

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    solar gl 235 sensor placement?

    Does it matter where I mount the one on solar panels?

    is better to mount on the cooler side going in or the hotter side coming off the roof?

    the other I assume is mounted by the pump.

    I didn't find any instructions

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    mas985's Avatar
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    Re: solar gl 235 sensor placement?

    Just to be clear the solar sensor does measure water temperature but goes on the outside of the pipe and is used to measure direct solar temperature. If the panels are on the roof and have full visibility of the sky, it doesn't really matter where you put the sensor but it should be close to the panels and get approximately the same sunlight.

    However, the water temperature probe should go after the filter and before the solar valve.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: solar gl 235 sensor placement?

    ok, thanks, but does the water temp probe need to have a hole drilled into pipe or just surface contact outside the piping?

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    mas985's Avatar
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    Re: solar gl 235 sensor placement?

    The water temperature probe requires a small hole to be drilled in the pipe and the sensor is inserted into the pipe. It should have a small o-ring on it so it seals with the pipe and you use a hose clamp to hold it against the pipe like this:

    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: solar gl 235 sensor placement?

    Quote Originally Posted by mas985 View Post
    Just to be clear the solar sensor does measure water temperature but goes on the outside of the pipe and is used to measure direct solar temperature. If the panels are on the roof and have full visibility of the sky, it doesn't really matter where you put the sensor but it should be close to the panels and get approximately the same sunlight.

    However, the water temperature probe should go after the filter and before the solar valve.
    Thats the part I was confused about on my thread. I thought the solar sensor went in the pipe just like the other sensor. It looks the exact same so I thought it mounted the exact same. It even has o-ring on it as well...

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    mas985's Avatar
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    Re: solar gl 235 sensor placement?

    The same sensor is used but it is installed differently because it is measuring different things (water vs sun).
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: solar gl 235 sensor placement?

    Ok, I see the O ring, thanks very much.

    Now it's EZ

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