tyhjiömittari

A tyhjiömittari, or vacuum gauge, is an instrument used to measure the pressure of a vacuum. Vacuums are characterized by a pressure significantly below atmospheric pressure. These devices are crucial in various scientific, industrial, and engineering applications where controlled low-pressure environments are necessary.

There are several types of tyhjiömittarit, each suited for different pressure ranges and operating principles. Mechanical gauges, such as diaphragm or Bourdon tube gauges, are typically used for rougher vacuums. Electronic gauges, including Pirani gauges, thermocouple gauges, and capacitance manometer gauges, offer greater accuracy and can measure lower pressures. Mass spectrometer gauges are employed for ultra-high vacuum measurements.

The choice of tyhjiömittari depends on the specific application and the required level of precision. They are commonly found in vacuum systems for manufacturing processes like thin-film deposition, semiconductor fabrication, freeze-drying, and in scientific research laboratories for experiments requiring controlled low-pressure conditions. Understanding the pressure within a vacuum system is vital for ensuring process efficiency, product quality, and experimental validity.