Dissolved Oxygen Meter

[303Dan]

Hey Everyone,

A few questions to those who have dissolved oxygen meters:

1. Recommendation on a good entry level model? I've been looking at the Extech DO600 and the Milwaukee MW600. Anything else I should be looking at?
2. What does the upkeep/maintenance cost look like on one of these devices in terms of replacement membranes, calibration solutions, electrolyte solution, etc? About how much $ per year does that amount to and how often do those things need to be replaced?
3. Anything else I should be considering?

Thanks,
Dan

 

[Qhrumphf]

What do you intend to use it for?

"Entry level" is really only gonna be useful for measuring oxygenation rates when pitching yeast. To that end, I just wouldn't bother.

If you're looking for cold side, you're not gonna find something sensitive enough that costs less than a car. Hell even some decently sized (think significant distribution in a major metro area) craft brewers basically rent or borrow them. The device we use at work is $19,000. Less reliable, less accurate models will still run several thousand dollars.

 

[303Dan]

I'm looking to use it for measuring DO levels at all the various points of the hot side brewing process as well as pre yeast pitch. A resolution of 0.1 mg/l with reasonable accuracy should be fine for my needs. The two models I'm looking at fit that description and are in the 150-200 dollar range.

So, I'm wondering if there's anything else around that price point I should be considering, and also what the upkeep costs are like for a portable unit like that.

Thanks,
Dan