The Fischer Navigator Series Aneroid Precision Hygrometer is the best of the best when it comes to precision. This Nautical barometer can be retrofitted to any boat or mounted to a wall in your home.
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Humidity (or moisture) in the air. For comfortable and healthy living and working conditions the humidity should be between 35 and 65% and temperatures between 18 & 24 C or 64F & 75F