The following correction is in order:
The offered item is a Electrohygrometer--not a hydrothermograph. The
difference being the hygrometer measures irh at a specific time and place. The
hydrothermograph measures irh over a period of tiem and records the data. (It
is also a far more expensive item)
The item advertised is STILL very useful in monitoring irh in areas for
exhibition and storage.
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