Electronic Measurement Of Ph And Cl?

[MeaMaximaCulpa]

I did not find anything when searching the forum (as a matter of fact I never do, either it's a poor search engine or a stupid operator; me).

Anyway, I would like to get hold of an elctronic device to accurately measure pH and Cl of my pool water. And any other relevant parameter for that matter. I find the small lithmus-like test kit with red and yellow liquids too inaccurate, it is very hard to match the colours.

First price if available in the Pattaya area, but BKK will also be OK.

Details anyone?

And would this device also be of use if/when I change to another system, like salt water chlorinator, or Purapool (have to research this more)?

[johnbarpic]

you will find what you require at this web link below Or contact Home & Pool in Pattaya Mr Vichapol will be able to help you

http://www.progensci.co.uk/page830/Product...ortablePhSticks

[MeaMaximaCulpa]

Thanks for that info, I shall investigate both sources, if I find anything practical available locally I will report back here.

It is dawning on me that pool chemistry is a little more complex than my childhood chemistry set...

[george]

I have been using Aquachek test strips for years, and they are fantastic. http://www.aquachek.com/

[MeaMaximaCulpa]

Thanks George,

The Aquachek strip system looks very interesting! I have learned that pH is possible to measure electronically, but not Cl (or possible, but VERY expensive). So a simpler and cheaper, but still accurate solution is what I want. We are getting closer...

Do you know if/where these Aquachek kits are sold in Thailand?

Do you use the digital strip reader? If yes, it is any better than manual readings? What parameters do you check, apart from pH and Cl (free or total, or both?)

[Naam]

The Aquachek strip system looks very interesting! I have learned that pH is possible to measure electronically, but not Cl (or possible, but VERY expensive). So a simpler and cheaper, but still accurate solution is what I want. We are getting closer...

it's possible to measure Cl electronically but you are right it's bloody expensive although extremely exact. my computerised dosage system measures both pH and Cl.

[MeaMaximaCulpa]

Naam,

It would be overkill for me to have automatic dosing system.

Do you have any experience with the Aquachek stuff that George mentioned, or any other way to simply but fairly accurately measure and control pH and Cl?

A salt water chlorinator is an option, but also not without hazzles...

Edit for typo (misspelled Goerge's name. Doh! Did it again!)

Edited May 24, 2008 by MeaMaximaCulpa

[sometime]

Naam,

It would be overkill for me to have automatic dosing system.

Do you have any experience with the Aquachek stuff that George mentioned, or any other way to simply but fairly accurately measure and control pH and Cl?

A salt water chlorinator is an option, but also not without hazzles...

Edit for typo (misspelled Goerge's name. Doh! Did it again!)

A salt water chlorinator is an option, but also not without hazzles...What hazzles

[Naam]

Naam, It would be overkill for me to have automatic dosing system.

as far as the investment is concerned i agree. i installed it for two reason. one is that i have become a very lazy sod and the other one is i don't want any 'service boys' running around on my property who (in most cases) do a sloppy job. on top of that my pool and surrounding pool area are now an integral part of my living area. so the automatic dosing comes in quite handy.

Do you have any experience with the Aquachek stuff that George mentioned, or any other way to simply but fairly accurately measure and control pH and Cl?

i don't and use for counterchecking Cl and pH the common testing liquids which -according to my experience- are quite accurate.

A salt water chlorinator is an option, but also not without hazzles...

why would that be an option?

[minimoocher]

Thanks George,

The Aquachek strip system looks very interesting! I have learned that pH is possible to measure electronically, but not Cl (or possible, but VERY expensive). So a simpler and cheaper, but still accurate solution is what I want. We are getting closer...

Do you know if/where these Aquachek kits are sold in Thailand?

Do you use the digital strip reader? If yes, it is any better than manual readings? What parameters do you check, apart from pH and Cl (free or total, or both?)

The aquachek distributor for Thailand is Purapool based on Samui. They sell a digital tester that shows Chlorine, PH and total alkalinity. they are priced at 3750THB and you can contact them on 077 960 565 or www.purapool.com

[T_Dog]

Here is a .pdf file for those wondering why you would ever want to measure pH.

Tooth_Damage_from_Swimming_Pool.pdf

[MeaMaximaCulpa]

Thanks for feedback and comments. Sorry for checking back in so late.

Since last time, the chemical balance went out the window (off scale for some parameters). I have therefore just now installed a salt water chlorinator, and is learning how to operate it for optimum water quality. Naam, with it "being an option", I only meant that it would require less frequent testing of the water. As for hazzles, I still have to add salt and now acid i.s.o. soda ash. But not so often. So me bad, poor language accuracy and usage.

I shall contact Purapool regarding the electronic device, interesting. In the mean time I have got a somewhat better and more comprehensive liquid based test kit, and it is a lot easier to get accurate pH readings off of this one (I have not tried the other tests yet, since Cl is easy to read on the small test kit). It is called "Poolrite 4 in 1 pool and spa test kit" from Pool Systems Pty Ltd, Brisbane, Australia. I also use a HM TDS meter from Korea (the hub of TDS meters!) for total dissolved solids. I must figure out how to calibrate it properly though. So lots more fun to be had.

As for the article about the tooth decay: scary! I already have quite bad teeth, so I better keep the chemistry balanced!

[gilbreth]

The easiest, most reliable and most economical system to ensure consistent pH and chlorine is a salt water system combined with a pH injector. The salt system will take care of the chlorine at very low levels (sometimes too low even for a litmus strip to pick it up), and the pH injector (muriatic acid) will measure and monitor pH digitally, and will inject pH (acid) when the measured point hits a "set point" (normally at 7.8). Because of the sodium chloride in a salt water pool (salt), the pH tends to rise gradually over time. This is why an acid injector is needed to knock the pH back into range of 7.2 - 7.8. You do not need to worry about the water becoming acid (less than 7.2) if you are no longer using caustic powder chlorine. This is the system I have on my pool - water chemistry is always perfect, and it cost me next to nothing. We manage 240 pools daily now, and this is the best comibination of equipment I have seen.

Best,

Gil

[zzdocxx]

Hey Naam, what's the cost on a system like you have pictured?

Or did you build it yourself?