Apera Instruments PH60 PH meter

[Silver_Is_Money]

Somewhere in the literature that comes with it, there's actually a recommended probe replacement timeline. I wanna say it's like every 18 months.
I got wacky results for a couple batches before I realized this was the problem.

Sounds like a new probe is exactly what I need then. Who has them at the best price?

 

[BrewMan13]

Sounds like a new probe is exactly what I need then. Who has them at the best price?

Don't know about best price, but I just got it at amazon: https://smile.amazon.com/gp/product/B01GA9EI3E/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[mbg]

Used my PH60 for the first time this past Saturday. My initial cal didn't go well but was probably user error (7.0 went well but 4.0 was jumping all over the place). Seems you really need to stir things up to make sure you wet the sensor and have no air bubbles. I was shooting for mash pH of 5.2 and measured 5.26 so not too bad.

Sorry - have a couple more questions:

1) Not a question - FYI found Apera has formula for KCL solution in the manual.
2) My PH60 came with three calibration solutions - 7.0/4.0/10.01. As brewers do we just cal with 7.0 & 4.0?
3) How many cals can you get with the cal fluid? Don't want to skimp but also don't want to waste. (I called Apera on two occasions and was told 10 times by one rep but another said maybe 5 on 7.0 but only 3-4 for 4.0 & 10.01.)

Thanks
Mike

 

[VikeMan]

2) My PH60 came with three calibration solutions - 7.0/4.0/10.01. As brewers do we just cal with 7.0 & 4.0?

Unless you plan to measure anything with a pH greater than 7, I'd recommend skipping the 10.01 (assuming your meter will let you).

 

[Silver_Is_Money]

I concur, and it will let you. I believe that the buffers should not be reused more than a scant few times each. And for best precision, not reused at all.

 

[logdrum]

I've taken to making a fresh buffer from powder for each brew day.

 

[mbg]

I've taken to making a fresh buffer from powder for each brew day.

I looked at the powders they offer at Amazon but do the 4.00, 6.86 and 9.18 work on the PH60? (Apera includes 4.0, 7.0, and 10.01 liquid in the kit)

 

[Silver_Is_Money]

There should be powders available for 4.01 and 7.01 pH buffers.

 

[logdrum]

The ones I got were 4.0 7.0 & 10.xx, looks like they're not available atm.