Article number: 8712448434904 View all of Talen Tools > View more: Hygrometers > When the humidity in your home or office is high, heating the room costs more energy than when it is low. A hygrometer measures the humidity, so you know whether you need to ventilate the room better or whether you should focus on increasing the humidity. Factors that influence humidity include: the number of people in the room (breathing and perspiration) plants and pets activities that use water (cooking, showering, mopping, etc.) the degree of ventilation. This spiral humidity meter can be attached to various surfaces using the suction cup on the back. The housing is made of plastic. Product specifications Hygrometer - 85 mm - round Article description Hygrometer - 85 mm - round Article number 8712448434904 Country of origin Netherlands