New Grower PH Meter: Cheap Yellow Stick pen Meter?

[Taviddude]

I have to say this in all fairness to other brands. I have to calibrate my hanna combo more than I should. I calibrate at LEAST once a week to see if it's off a few points. The thing goes stupid every once in a while too which is bs. I think I got a shitty probe which is under warranty but I would have to mail it out and they don't have a loner program. I'll buy a new one when it goes and hopefully it will be more trustworthy. If I had it to do again I would have bought a blue lab

 

[Muddy]

Are you using storage solution to keep the bulb moist? If not the bulb dried out and can go out of calibration. Also, if you don't use cleaning solution from time to time deposits can build up on the bulb, causing it to go out of calibration and again, leading to failure. I know first hand, as I had to replace the bulb in mine for those very reasons.

I have to say this in all fairness to other brands. I have to calibrate my hanna combo more than I should. I calibrate at LEAST once a week to see if it's off a few points. The thing goes stupid every once in a while too which is bs. I think I got a shitty probe which is under warranty but I would have to mail it out and they don't have a loner program. I'll buy a new one when it goes and hopefully it will be more trustworthy. If I had it to do again I would have bought a blue lab

 

[rhapsodyrcks]

I use this one

http://www.amazon.com/Oakton-EcoTes...=UTF8&qid=1348159884&sr=8-5&keywords=ph+meter

Then I keep it stored in ph 4.0 reference solution. Works like a champ.