Revised buying guide for pH meter (based on the book Water)

[Buckeye_Hydro]

The MW 102 probe cap:

 

[Buckeye_Hydro]

And yes, we still have the MW102 on sale.
http://www.buckeyehydro.com/mw102-ph-meter/

Use the coupon code HBT MW102 for $15 off. For Home Brew Talk users only.

Russ

 

[user 246304]

No problem with doing things this way except... Storage solutions are almost always saturated solutions of KCl. Thus water evaporation is not a problem from the POV of the strength of the solution. It stays saturated. Deposition of KCl crystals on the electrode is not a problem either. Just rinse them of with a stream of DI water from a lab squirt bottle.

Yes. That is how the manufacturer intends it to be stored. The sponge is there to retain some liquid it being important to keep the bulb moist rather than wet. The only problem with the storage cap approach is that KCl creep will eventually remove the liquid even if the electrode with cap is stored vertically so be sure to check it and top it off from time to time if you are using it infrequently.

You shouldn't be seeing this in the Hach because you shouldn't be filling the cap with storage solution. A few drops of DI water in the bottom of the cap with the meter stored vertically keep the humidity inside the cap high enough to keep bulb and junction hydrated.

It does.

OK great, many thanks AJ.

 

[user 246304]

The MW 102 probe cap:
View attachment 574827

You as well, Buckeye.

 

[rhys333]

Anyone have feedback on meters since the last posting in 2016?

I have been reading over multiple threads however some of the information seems above my knowledge. I just want to make sure my mash water is in good range for efficiency.

Amazon is flooded with 14-16 dollar meters that seem like they fit the bill, but these can't possibly be worth dealing with are they?

I'm really liking my Thermoworks 8689. It's budget friendly and very effective. They also have good customer support.

 

[Buckeye_Hydro]

Amazon is flooded with 14-16 dollar meters that seem like they fit the bill, but these can't possibly be worth dealing with are they?

No, they aren't. Uber low end pH meters are really not worth owning.