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What are the pros and cons of buying a combo meter?

Contributed by 10k:

The combination type meters are real handy for the convenience of being able to take both readings simultaneously, or with a single touch of a button to switch between modes. The problem IMHO with combination meters is pH sensors like to be stored in a fertilizer solution, but TDS probes like to be stored in distilled water. Storing the pH probe in plain or distilled water will damage the ph membrane, so the combination probe needs to be stored in a fertilizer solution so as not to damage the pH portion, so the TDS probe ends up being "dirty" from salt buildup. A friend has already lost one expensive probe on his Hanna from this same problem, and will only purchase "single function" pH or TDS meters in the future.

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Last update:
2001-02-25 13:43
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