Cheap and useful hydrometer – Battery-Free Indoor Wall Thermometer and Hygrometer/Humidity Reviews
posted by MarkPessoa on 04/10/2013
Involvement:General (knows how to use it) - Ownership:more than 1 month
Cheap ans simple way to measure humidity and temperature. Works without batteries and changes very fast when changing conditions. Small and without moving parts.
For almost the same price you can buy a colorfull model. As it is ismall, you must read the humidity and temperature close to the unit. Seems to be fragile because it is all made of plastic.
Humidity under 40% causes respiratory problems, especially if you your kids are sleeping in air conditioner environment. This is very useful to measure humidity and decide if you will turn on the humidifier.
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