Digital Ph Meter

[Donya]

I've got a Milwakee digital Ph meter with one electrode (sm101). If I make sure the electrode is thoroughly cleaned prior to use so there is no storage or other solution residue, can I dip it directly into the tank or is it only safe for testing water samples? I've been testing water samples so far to be on the safe side.

Also I need to get some more calibration solution...supposed to use 10.01, but does it matter what exact solution I use on the high end as long as it has 2 decimal places of accuracy?

 

[steelhealr]

I have pinpoint's pH monitor. My probe is in my middle chamber with continual readings. I check periodically with pH 10.01 and 7.01. SH

 

[Paul_MTS]

i'm not sure if you can use others, it will usually tell you in the instructions, but all the different calibration fluids are easy to pick up off ebay for a few quid.

 

[Donya]

The instructions are very vague, so I guess I'll go for 10.01 and be safe. I take it that it's ok to test putting the electrode right in the tank then?

 

[john27]

you need to use 2 calibration fluids, use 10 and 7, or what ever make of fluids you can get close to them (it does not matter who manufactures them)
i have the pinpoint meter and the probe is constantly in my tank.
john

 

[smithrc]

i dip ours straight into the tank... havent calibrated it yet though... the only tank that fluctuates is the planted - the other are at approx 7.4 all the time. so i dip the digital in them and see what it says... - oh 7.4 that'll do me