Indoor measuring range
The temperature range at which the weather station's internal temperature sensor (see "Measurements") can operate normally. Of course, for normal use, it is need to the temperatures in the room do not go beyond the specified range — otherwise the device will give a warning about the impossibility of measurements in the best case, and at worst it will fail altogether. However, it should be noted here that temperature fluctuations inside residential and office buildings are relatively small, and even in the most inexpensive weather stations, the operating range of the corresponding sensors covers these fluctuations with an impressive margin. Therefore, it makes sense to pay close attention to the measurement temperature in the room only when the device is purchased for non-standard applications — for example, for installation in a greenhouse or in a warehouse with low temperatures.
Outdoor measuring range
The temperature range for which the external temperature sensor of the weather station is designed (see "Measurements"). This parameter must correspond to the temperature differences that this sensor may be exposed to during operation — otherwise, malfunctions and even hardware failures are possible. Of course, it is worth choosing a model according to external temperature, taking into account the climate in which it is planned to be used; at the same time, it is worth taking a certain margin both in the lower and in the upper side. The last is connected not only with the possibility of climatic fluctuations, but also with the fact that outdoor equipment can be heated from direct or reflected sunlight; this, of course, must be avoided in every possible way, but it is not always possible to find an perfect fitting location for the sensor.
Sunrise / sunset times
Ability to use the weather station to obtain information about the
time of sunrise and sunset. Since this time varies depending on the specific date and geographic coordinates of the observer, this possibility requires the presence of a calendar (see "More features"), as well as tools to clarify the mentioned coordinates. The simplest version of such tools is a list of the world's largest cities, from which the user need to choose the closest one; this is convenient, but the accuracy is not very high. In more advanced models, it may be possible to set specific geographic coordinates or locations on the map. Also, devices with this function are usually equipped with a clock (see "More features"), although technically this is not required.
Form factor
External representation of the weather station allows you to better fit the model into the interior of the room according to your preferences and taste. Among the models are
square and horizontal of two types —
horizontal and
vertical.
Display
The type of display provided in the design of the weather station.
—
Monochrome. In this case, this term usually refers to black-and-white screens (both two-colour and capable of working with shades of grey). They are noticeably cheaper than colour ones, and although they have more modest capabilities, even these capabilities are usually quite enough to display data produced by weather stations. Therefore, this option is by far the most widely used.
—
Coloured. This category includes all screens capable of displaying more than one basic colour — from the simplest indicators with multi-coloured light of icons to full-colour LCD matrices, suitable even for working as digital photo frames (see "More features"). Anyway, the colour image is richer and more pleasing to the eye than black and white, but the these screens are more expensive, and the abundance of colours is not required for basic functions. Because of this, this option is not widely used and is found mainly in household models designed for a pleasant appearance and/or work with additional functions.
Dimensions
Dimensions of the main unit of the weather station. This option allows you to estimate the space required to install the device. However, most modern models are very compact, it makes sense to pay close attention to the dimensions only when you have to install the device in a very cramped place.
Transmitter dimensions
Dimensions of the wireless unit (see "Type of external sensor") that the weather station is equipped with. Such units are usually small, and finding space for their installation is not a problem; however, in some situations (for example, when placed in a miniature wall niche), accurate dimensions may not be superfluous.
Weight
The total weight of the device. In models equipped with external sensors, this parameter is usually indicated only for the main unit, because the weight of the external equipment is small and can be neglected.