What materials are typically used in vacuum sensors?

Hello dear colleagues,

Vacuum sensors, also known as vacuum gauges, are designed to measure pressure in a vacuum range. The type of material used in vacuum sensors often depends on the type of sensor and its application. Here are some materials typically used in various types of vacuum sensors:

    Thermocouple Gauges: These gauges, which operate by measuring the heat conductivity of a gas, typically use a fine wire made from tungsten or platinum. The wire is heated and the gauge measures the rate at which the wire cools to infer the pressure.

    Pirani Gauges: Like thermocouple gauges, Pirani gauges also measure thermal conductivity to infer pressure, and often use a platinum or tungsten wire.

    Capacitance Manometers: These devices work by measuring the change in capacitance due to the deformation of a diaphragm. The diaphragm material varies but can include stainless steel, Inconel, or Hastelloy. The measurement cavity is typically made from a ceramic material, such as alumina.

    Ionization Gauges: These devices, which measure pressure by ionizing a sample of the gas and measuring the ion current, typically have components made of glass or metal. The ionization can be achieved using a hot filament typically made from tungsten or iridium.

    Cold Cathode Ionization Gauges: The main parts of a cold cathode gauge are the cathode and anode, which are typically made from materials like stainless steel or other materials that can handle the discharge process.

    Quartz Crystal Microbalance (QCM) Gauges: These gauges, which measure mass by observing changes in frequency on a quartz crystal, will use a quartz crystal sensor which is often coated with a thin layer of gold or silver.

It's important to note that the materials used will depend on the specific design of the sensor and the intended application, including the level of vacuum to be measured and the environmental conditions (temperature, presence of corrosive substances, etc.). It's always recommended to check with the sensor manufacturer for the specific materials used and their suitability for your application.

Below, you can find the items where we try to answer the most frequently asked questions from our users. Vacuum control technologies are advancing every day, and factors such as efficiency, environmental compatibility, and carbon footprint are becoming prominent.

Regarding Vacuum Sensors:

- What is a vacuum sensor and how does it work?

- What are the different types of vacuum sensors?