Selina

Selina’s sensor has a tolerance range of +/- 3%. In order to compare the humidity displays of hygrometers, measurements must be taken under the same conditions (e.g. the same temperature) and in the same position. A distance of one metre between two hygrometers may, under certain circumstances, cause a deviation. Please note that all hygrometers have a tolerance range, usually +/- 5%. Do not place your Selina on or near a radiator or right by a window.

Basically, a hygrometer should be placed where the air humidity is to be measured. In order to make sure that Roger indicates the correct level of air humidity, the following should be taken into account when deciding where to place him: Air should be able to circulate freely. In other words, a hygrometer should not be placed on the floor in a corner or on a shelf behind books. Neither should a hygrometer be placed anywhere where there is a risk of air coming in from outside such as right next to windows or doors, for example. You should also choose a spot where the device is away from direct sunlight as otherwise the air humidity value may be distorted.