TFA 20.1000.01 - Meteorologinė stotelė

The weather station contains a barometer, hygrometer and thermometer - the instruments are 70 mm in diameter (thermometer, hygrometer) and 81 mm in diameter (barometer). The base is beech stained in a shade of oak. Technical parameters Width: 105 mm Height: 275 mm Instrument diameter: 70 mm, 81 mm Weight: 361 g Instrument colour: gold Bezel colour: gold Base colour: oak Thermometer: Yes Barometer: Yes Hygrometer: Yes How does the barometer work? A mechanical barometer or strain gauge, also known as an aneroid, works on the following principle: when the ambient air pressure rises, the metal aneroid box inside the gauge is compressed; if it falls, it is expanded. These fluctuations are transmitted by a set of levers on the needle. The internal mechanism, however, has its friction surfaces and transmission resistance, and therefore every mechanical barometer has its own internal hysteresis, which manifests itself in a certain delay of the pointer. This is also why it is necessary to tap the instrument to get an accurate instantaneous atmospheric pressure reading.