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With this equipment one can determine the highest and/or the lowest temperature and air humidity values. On push of a button the old values are to be deleted. In addition the equipment an outer feeler, one has can thus the feeler e.g. into a box hang or area and the equipment outside station.
IMPORTANTLY for an optimal climatic adjustment.
so one can always control whether it in " Light phase" or in " Night phase " too coldly or to warm it was and whether the air humidity is in the plumb bob and was.
Not straight unimportantly; =)