We want to design an electrolytic tank using tab water in-order to that we need to know the resistance of the tab water so we can design the tank dimensions, moreover, multimeter doesn't work it gives unstable reading between 250-350 ohms for 1 liter of waterWhy dont you use a multimeter?
It's about using two probes at a set distance. Note the use of centimeter in the descriptions:We want to design an electrolytic tank using tab water in-order to that we need to know the resistance of the tab water so we can design the tank dimensions, moreover, multimeter doesn't work it gives unstable reading between 250-350 ohms for 1 liter of water
Thank you! that was very helpful, yes (tap** water)It's about using two probes at a set distance. Note the use of centimeter in the descriptions:
Resistivity - the tendency of water without ions to resist conducting electricity.
The unit of measure is megohm-centimeter (MΩ-cm), often shortened to MΩ or "meg". It is generally used for high purity water. The theoretical maximum is 18.2 MΩ-cm at 25°C. The higher the ionic content - the lower teh resistivity and the lower the ionic content - the higher the resistivity (high resistivity is good!). In ultrapure water systems this value is determined using an in-line meter. Conductivity and resistivity measurements are inversely related to each other.
Conductivity - the tendency of water that contains ions to conduct electricity.
The unit of measure is microsiemens/centimeter (µS/cm) or microhm/cm. The measurement is used to measure feed water or lower quality treated water. The more ions present in the water, the higher the conductivity. This is measured by a conductivity meter.
Resistance and conductance are reciprocals. A conductivity probe is used. The electrical conductivity of a solution of an electrolyte is measured by determining the resistance of the solution between two flat or cylindrical electrodes separated by a fixed distance. An alternating voltage is used in order to avoid electrolysis. The resistance is measured by a conductivity meter. This is not as simple as shoving two probes from a DMM set to measure resistance into a glass of tap water. Tap water alone, here in the US will vary between cities and can change day to day. I assume where you use tab water you mean to say tap water?
Ron
This is a little off topic but like many here in the US I grew up with the unit of conductivity being the Mho which everyone knows is Ohm spelled backward. Thought that was cool right till Siemens came into my life.Please note that the units of resistivity would be Ω⋅m, not Ω/m.
Conductivity is the reciprocal of resistivity and the units are S/m.
At around 13?Thought that was cool right till Siemens came into my life
"The siemens (symbolized S) is the Standard International (SI) unit of electrical conductance. The archaic term for this unit is the mho (ohm spelled backwards)".At around 13?
Yeah, and what's with that? I think it's part of a large plot or movement. I have noticed those damn black helicopters and now drones around my house, just hovering. I think they are watching me. I flipped one off the other day and await the consequences.Is there any other SI unit that is simply the reciprocal of another SI unit? Why should it be an SI unit when something as useful as an inch or psi or torr aren't?
That's nothing like radiation units. I work in nuclear physics and we've had to learn and then drop curie, rad, rontgen, rutherford and replace them with gray, sievert, becquerel."The siemens (symbolized S) is the Standard International (SI) unit of electrical conductance. The archaic term for this unit is the mho (ohm spelled backwards)".
The archaic term? Archaic is things like The Pyramids, Sphinx, West Wall or Rome Coliseum. I learned Mho and I am getting tired of people screwing around with naming conventions. I learned Ohms Law as E = I * R but no, we had to change that and make V in there for E. They never consulted with me about that. Then if all of that wasn't enough trauma in my life Oh yeah and then I learned enough to get my first amateur radio license at 13. All my radio dials simply said Kilo-Cycles or Mega-Cycles and even some said Kilo-Mega-Cycles and we just had to screw with that. Now for those who needed it further defined we needed Hertz. Note how again the SI (System International) had to change my life. The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as cycles per one second. It is named after Heinrich Rudolf Hertz, the first person to provide conclusive proof of the existence of electromagnetic waves. All we did was change the name again. What's with that anyway?
Yeah, and what's with that? I think it's part of a large plot or movement. I have noticed those damn black helicopters and now drones around my house, just hovering. I think they are watching me. I flipped one off the other day and await the consequences.
Keep in mind this little rant is all done in humor just in case anyone actually would believe I was serious. I am beginning to feel my age a little though.
Ron
See what I mean. Hey on a radio active note I just read where my company I retired from just got another US One Billion Dollar contract with the US Navy. I like solvent, keep those retirement checks coming. Anyway, yes, see what I mean? People just aren't happy unless they screw with things. Pluto is still a planet in my solar system! So There!That's nothing like radiation units. I work in nuclear physics and we've had to learn and then drop curie, rad, rontgen, rutherford and replace them with gray, sievert, becquerel.
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