- #1
SMD1990
- 49
- 0
Hello. Today, I have observed something which I do not understand. I have a glass of water with some table salt in it. I stuck the probes of my digital multimeter into the water. Strangely, I am getting a reading.
If there is any current, it is less than a tenth of a mA. Still, the voltage has been as much as 300 mV. Though, unsteady.
It went up and down, perhaps as low as half the peak value. Then, it would recover. Sometimes, it would hang around one value with little change. Then suddenly, it would begin to quickly change, before slowing again.
Even after hours, I still see about 30 mV. Though, it is a lot more steady now.
Just a moment ago, I repeated what I did earlier in the day. Similar results.
My analog multimeter does not show any voltage. Then again, the smallest of its ranges is 10 volts. Such small millivolt readings are difficult to make.
Anyway, does this have to do with the dissolution of the table salt? That is the only answer I can come up with...
I had never heard of this before...
If there is any current, it is less than a tenth of a mA. Still, the voltage has been as much as 300 mV. Though, unsteady.
It went up and down, perhaps as low as half the peak value. Then, it would recover. Sometimes, it would hang around one value with little change. Then suddenly, it would begin to quickly change, before slowing again.
Even after hours, I still see about 30 mV. Though, it is a lot more steady now.
Just a moment ago, I repeated what I did earlier in the day. Similar results.
My analog multimeter does not show any voltage. Then again, the smallest of its ranges is 10 volts. Such small millivolt readings are difficult to make.
Anyway, does this have to do with the dissolution of the table salt? That is the only answer I can come up with...
I had never heard of this before...