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skelet666 [1.2K]
3 years ago
6

The hygrometer must be calibrated before it is used. How might this be done?

Biology
1 answer:
kakasveta [241]3 years ago
8 0
Place a teaspoon of salt in a bottle cap or small cup and dampen it with a few drops of water (without dissolving it). Carefully place the wet salt and the hygrometer inside a see-through container and close tightly. You can use a zip lock bag provided it seals well and you leave some air inside as well
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