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Hi!
Can anyone recommend a good battery conductivity tester to use for this event? I'm not sure I'm looking at the right things online- lots of aquarium, pool, and hot tub devices pop up.
Thanks!

jodidavis wrote: ↑October 3rd, 2023, 12:41 pm Hi!
Can anyone recommend a good battery conductivity tester to use for this event? I'm not sure I'm looking at the right things online- lots of aquarium, pool, and hot tub devices pop up.
Thanks!

[hide]If you want, there's a way to make one at home; it's cost-effective and it works well as long as you have enough of the powder dissolved in water. If not, there are some pretty good ones on Amazon.[/hide]

https://www.flinnsci.com/flinn-conducti ... er/ap1493/ These are the ones we used when I competed. They're unfortunately not cheap (this is what you get for buying from science supply stores)--I'm sure there's cheaper options out there but you need to make sure that they use a 9V or less battery because that's what's specified in the rules. It really wouldn't be difficult to make one yourself if you have the right tools and bits but not everyone is interested in doing that, so.

EDIT: You'll be tempted to buy the United Scientific one that pops up on Amazon right away, because it looks almost the same and is 10 dollars cheaper, but don't. It uses a 12V battery instead of a 9V one so it's not allowed. Event supervisors probably won't check, but you don't want to take the risk and potentially get hurt because of it.