or: how pH probe really works?
Recently I have purchased digital pH probe for my aquarium. I paid only 10 EUR for it, since it was broken, but virtually new/unused. I though I should try to repapir it and learn something about pH probes in the process. I was lucky to succed.
Note: switch into Full Screen to watch in HD resolution.
Voltcraft PHT-01ATC is a pH probe with automatic temperature compensation sensor (termistor) integrated into glass and connected with additional pair of wires to the PCB board. Glass probes with integrated temp sensors are usually lower quality probes, but it should be enough for hobby use. Probe must be kept constantly moisturized in pH 4.00 or similar solution. After the tricky repair process I plan to add standard BNC connector to the main case, since the probe is now extended with a cable, so it could be easily replaced with new or expencive probes in the future without throwing the main voltmeter unit.
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