Troy, you can use any meter for the cheese from the milk stage all the way to customer ready. The difference is in ease of use, durability, and convenience... and longevity. For example, with a glass bulb round electrode, there all all sorts of nooks and crannies for the proteins to settle on, so your bulb may get dirty more easily than say a probe or ISFET chip probe with a tip. Similarly, the probes may differ on the type of reference solution they use (common is Ag/AgCl/KCl), and the material that the permeable membrane is made of that lets the reference solution pass through. Teflon or a composite material or an ultra high end ceramic is better than other types, for example. When electrodes fail, it is usually because the reference solution has become contaminated, or there is protein gunk covering either the bulb or the reference junction.
That's why a glass probe with a tip is a better choice; it's easier to clean. And that's why a refillable electrode is a better choice - you can usually degunk the reference junction, but it fouls up your solution, so you need to rinse and refill.
Some electrodes will use a gel KCl reference, which helps to prevent fouling, but of course once the solution is used up, unless you drill a small hole and refill it, the electrode is no good.
So to answer your question more directly, yes you can use it for anything. Remember to not store dry. Even an ISFET should be stored wet part of the time, or the saturated KCl reference will crystallize. If you do store dry, it's not the end of the world, but it takes 1-2 hours to revive the electrode. Almost any electrode can be revived. The one case where it's very unlikely is if the reference junction material is so gummed up that it's not letting ions pass through, or if the glass bulb is damaged.
