[Master503]

Hi

I noticed on ebay there is pH digital Pen test (similar like TDS pen), does this one work accurate?

 

[steakman]

Not really.
They are very inaccurate.
The better ones that are sold for more than $175.00 with probe, storage, and calibrating solution, are more accurate.

 

[ChadO]

Not really.
They are very inaccurate.
The better ones that are sold for more than $175.00 with probe, storage, and calibrating solution, are more accurate.

Agreed! I had one of the inexpensive ones, and you'd have to let it settle for up to 15 minutes to get a reading. It just wasn't worth it at all. I ended up adding another pH probe to my Apex controller and monitoring that way.

 

[Julianzh]

those pens are cheap for a reason. I bought one before and it's very inaccurate even after re-calibrating.

 

[sbarbee54]

Pens suck.

 

[Master503]

Thanks all, great thoughts. I will continue to use the liquid test.