Alternative to comparator when measuring PH & Chlorine?

[Docpatel]

Couple of related questions:

1. Is there an alternative to measuring PH instead of the color comparator? My eyes can't tell the difference between 7.8 and 8.0.

2. Is there a liquid alternative to the DPD powder (R-0870)?

 

[mknauss]

1. You can get a pH meter. Cheap ones work a few times. More expensive one work well if maintained.
2. No.

 

[Docpatel]

Thank you! Any thoughts on the Milwaukee Instruments MW102 PH and Temperature Meter (selling for $122 on amazon).
And guess it's time to order the DPD powder.

 

[mknauss]

I have no experience with pH meters. Some on the forum use them. I think they primarily use Hanna ones. Do a search.

TFTestkits will be running their complete TF100 refill sale here very soon. Might want to wait on that.

 

[mknauss]

There is really no reason to commiserate over the pH at 7.8 or 8. Just call it one of them and adjust to 7.6. Nothing will be harmed.

 

[Docpatel]

Got it. Thank you! Love this site/forum!

 

[JohnT]

You might try an extra drop of the reagent. It helps some people distinguish the color better.

 

[AUSpool]

Try taking a photo of the comparator with reagent in front of white background and then see if you can get a better comparison from the photo.