tyhjiömittarit

Tyhjiömittarit, also known as vacuum gauges, are instruments used to measure pressure in a vacuum. This means they measure the difference between the absolute pressure of a space and the atmospheric pressure. They are essential in many scientific and industrial applications where maintaining a low-pressure environment is critical.

There are several types of tyhjiömittarit, each suited for different pressure ranges and applications. Mechanical gauges, like diaphragm gauges and Bourdon tube gauges, are generally suitable for measuring higher vacuum levels. Electronic gauges, such as Pirani gauges, thermocouple gauges, and capacitance manometers, offer greater accuracy and can measure a wider range of pressures, from moderate vacuum to ultra-high vacuum.

The principle of operation varies depending on the type of gauge. Some rely on the physical deformation of a component under pressure, while others measure changes in electrical properties caused by the reduced number of gas molecules. The choice of tyhjiömittari depends on factors like the required accuracy, the pressure range to be measured, the type of gas present, and environmental conditions. These instruments are widely used in research laboratories, semiconductor manufacturing, food packaging, and space simulation chambers.