Science Buddies: "Ask an Expert"

When I was doing the science experiment I found out that the conductance kept on going down. For example, when I was measuring the Gatorade the conductance was 3.02 milliamps then, after I rinsed everything with distilled water, I tested the Orange juice. 2.89. Seems like the Gatorade was winning. But I needed to repeat the experiment because, well, it's science. This time I tested the Orange Juice first. It was at 1.23 milliamps. then I tested the Gatorade. 1.20 milliapms.
The numbers just kept on going down after that until it got to 0.30 milliapms. I don't know if this is a problem with the multimeter or the wire. I suspect that it is a problem with the multimeter because I tested the wires and it was all perfectly conductive.
Is this normal? Please help
Thanks

Hi,

I'm assuming that you're working on the project described at the following link:

https://www.sciencebuddies.org/science- ... orts-drink

Sorry that you're having problems with your conductance measurements. Have you tried using a fresh battery in your conductance circuit? It's possible that the low current values are due to a weak battery.

Be sure to remove the conductance sensor from any solutions as soon as you've made your current measurement. And remember to immerse the conductance sensor to the same depth in the solution for each measurement.

I hope this helps. Please ask again if you have more questions.

A. Norman