Fischer marine weather station - barometer, hygrometer, thermometer 1508BTH-45.6 Diameter 125mm Application: indoor Material: brass, chrome plated brass, stainless steel Product type: barometer, hygrometer, thermometer Accuracy of barometer measurements: ± 3 hPa Accuracy of hygrometer measurement: ± 5% rh (20 ... 100%), + 1 graduation scale Accuracy of thermometer measurement: ± 1 K, +1 graduation scale It is well known that the higher above sea level, the lower the pressure. The higher the pressure, the less variable the weather becomes. With pressures higher than 1020 mbar, we can expect a dry, clear day. In summer it will be just nice weather, in winter the day will probably be frosty (although with the possibility of fog). The pressure in the range of 1005 - 1020 mbar is changeable weather. Moments of brightening can alternate with a passing rain. At pressures below 1000 mbar, the sky will be clouded and we can expect rain. An increase in pressure means an improvement, and conversely a decrease in pressure means a deterioration in the weather. Summer, sudden, pronounced spikes in pressure can indicate severe thunderstorms. A barometer is a very precise device that measures air pressure. For this purpose, it uses the so-called a vacuum can whose walls expand or contract by hundredths of a millimeter depending on changing air pressure. A person feels comfortable at a temperature between 18 and 22 degrees Celsius and with an air humidity of 35-65%. We should ensure proper air humidity. It is a matter of our health and well-being. It should be remembered that the air humidity measured with a hygrometer located in the house will only correspond to the humidity inside. Outside, large jumps in humidity occur during the day. The scaling of the barometer, thermometer and hygrometer was performed at the factory. However, due to e.g. strong shocks, new regulation may become necessary. To do this, in the case of barometer and hygrometer, use a screwdriver and adjust the screw on the back of the device according to the instructions in the enclosed manual. In the case of the thermometer, when the mercury column has ripped apart, it is helped by a sharp jerk several times. The Fischer company was founded in 1945. in Drebach, Germany, and has been building barometers, hygrometers and thermometers there ever since. It is over 70 years of experience in this industry. Today Fischer is a well-known and respected supplier of high-quality products.