fischer Barometer Thermometer Hygrometer Weather Keeping Rustic Oak 6699-34

- Total height: 540 mm. - Total width: 150 mm. - Instrument diameter: 130 mm / 63 mm. - Offer: rustic oak wood décor. - Warning: shown in the picture is mahogany colour. We also have other designs in stock Finest design and top quality from Fischer. To measure atmospheric air pressure, aneroid barometers use the deformation of a flat air empty metal can. Increasing air pressure squeezes the can together, when air pressure falls, it expands again. This movement, which is only a few hundredths of a millimetre, is transmitted to the pointer with the help of a fine mechanism, thus showing the air pressure. Room barometers are often combined with thermometer and hygrometer. These two devices are measuring instruments for the living room climate.