What does a capacitance manometer measure?

Baratron capacitance manometers measure true pressure (defined as force/unit area). This means that the measurement is insensitive to the type of gas being measured. Other gauges, such as Pirani, thermocouple and ion gauges, do not measure true pressure and therefore their readings will be gas-type sensitive.

What is a Baratron used for?

The MKS a-Baratron® manometer is an advanced general purpose absolute heated capacitance manometer developed specifically for use in vacuum and pressure measurement applications where high accuracy and excellent repeatability are crucial to process success.

How does a thermocouple vacuum gauge work?

The thermocouple gauge is a device used to measure low vacuum. A filament is heated up by passing a current through it. When gas molecules interact with the filament, heat is carried away. Therefore higher pressure in the chamber means that more heat is taken away.

How does a Penning gauge work?

3.1 The Penning gauge The working principle of this type of gauge is to generate a discharge between two metal electrodes (anode and cathode) by applying a DC high voltage. The discharge current is pressure dependent and serves as measurand for pressure.

What is a capacitive pressure gauge?

A capacitance diaphragm gauge, commonly referred to as a CDG, measures vacuum gas pressure by direct measurement of the applied force on the surface of a thin diaphragm.

How does a Pirani gauge work?

The Pirani gauge measures the vacuum pressure dependent thermal conductivity from the heated wire to the surrounding gas. The heated Pirani sensor filament is typically made of a thin (<25 µm) Tungsten, Nickel or Platium wire. As gas molecules collide with the filament wire, heat is transported from the hot wire.

How does a manometer measure vacuum pressure?

When a vacuum is applied to one leg, the liquid rises in that leg and falls in the other. The difference in height, “h,” which is the sum of the readings above and below zero, indicates the amount of vacuum. Instruments employing this principle are called manometers.

What are vacuum gauges?

Vacuum gauges are basic measurement components for vacuum furnace systems and can be found either in vacuum lines or connected directly onto the vacuum chamber. For all intents and purposes, a vacuum gauge is an instrument for measuring pressures below that of atmospheric pressure.

How does a TC gauge work?

Operation of the gauge depends on the thermal conduction of heat between a thin hot metal strip in the center and the cold outer surface of a glass tube (that is normally at room temperature). The metal strip is heated by passing a current through it and its temperature is measured by a thermocouple.

What is the range of Penning gauge?

The Penning Gauge PEG100 has been designed for vacuum measurement of in the pressure range of 1×10-9 to 1×10-2 mbar.