Quote:
Originally Posted by xchcui
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I would like to understand the issue,it is not just to know if the coolant is good or not .
I can check the coolant,also,with PH strip as other mentioned.
But this is not my main reason for my question.
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Do you believe in experimenting? I tried a stainless probe (AC vent thermometer) in the coolant and the voltage started at 0.09 volts and did not drop. I also tried a copper probe (piece of roof flashing) and the voltage started at 0.3 V and dropped steadily, just like the HF meter probe and alligator clip probe I tried, which I believe are tin plated. Maybe the probe material, depending on material, is reactive with the coolant (or not) via electrolysis? Just a guess. If you really need to know the truth, I am sure you will find the answer if you put enough time, effort and money into it.