Product review (1 stars): Worst $10 spent
I bought this to track the humidity in my incubator as my chicks were hatching. I didn't have another hydrometer to check it against but it was entirely wrong! 10-20% off. I had hatching problems the entire time and now in an incubator with NO water added to the trays it is saying 99% humidity. Worst $10 spent. I am hoping to find a better option.