Correct. Rule 2d: "Each team must bring a participant-made salinometer/hydrometer capable of measuring salt concentrations between 1-10% (mass/volume)."DragonTownEpic wrote: ↑January 28th, 2020, 12:44 pm I don't think a store-bought salinometer is allowed.
Food Science B
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Re: Food Science B
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Re: Food Science B
In rule 2b, it says we must build a salinometer capable of measuring 1-10 percent salt solution. It also states that it must operate within a 500 ml beaker filled with at least 400 milliliters of water. But at the regional contest, while measuring the salt content of pickling liquids, we had to work with a 100 ml graduated cylinder. Should I expect to see that at state? Or should I just focus on 400 and 500ml when building the salinometer.
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Re: Food Science B
Amoeba55 - For regionals I made an arduino ppm sensor. PPM (parts per million) is an accepted measure of salinity. However, I think the judges were kind of confused because they wanted salinity percent. So I just ended up using my backup manual density salinometer. There is a way of finding percent from ppm and we did that, but that meant we had to calibrate the ppm sensor everytime to get accurate results. And I wasn't very confident with that. Here is the project I used - https://hackaday.io/project/7008-fly-wa ... er-arduino
Hope this helps
Hope this helps
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Re: Food Science B
I have run Food Science for several invitationals as well as having supplied the materials for the NYC Regional. The rule clearly states what you are saying. If you are provided a 100mL graduated cylinder I would definitely say something during the test. That is not appropriate.Advith9 wrote: ↑March 8th, 2020, 9:35 am In rule 2b, it says we must build a salinometer capable of measuring 1-10 percent salt solution. It also states that it must operate within a 500 ml beaker filled with at least 400 milliliters of water. But at the regional contest, while measuring the salt content of pickling liquids, we had to work with a 100 ml graduated cylinder. Should I expect to see that at state? Or should I just focus on 400 and 500ml when building the salinometer.
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