Figure 1: Hot-Cathode Ionization Gauge.
The basic principle of an ionization gauge is the electrons emitted from a cathode strikes a gas molecule and knocks out an electron from it. Thus the gas molecule remains as a positively charged ion and carries a current called ion current. This current become a measure of the applied pressure when calibrated. Continue reading What is Ionization Gauge? Working Principle, Diagram, Construction & Applications
The operating principle of thermocouple Vacuum Gauge is that the conducting ability of gas in vacuum or low pressure depends on the pressure i.e., it is a function of pressure. The measurement of vacuum using thermocouple gauge is shown in figure 1.
Figure 1: Thermocouple Vacuum Gauge. Continue reading What is Thermocouple Vacuum Gauge (or Thermocouple Conductivity Gauge)? Working Principle, Diagram, Construction & Applications
Semiconductor Strain Gauge is also called piezo-resistive strain gauges. These are made up of doped silicon and germanium which have crystalline structure. When subjected to strain, resistivity of this material changes. This property is called piezo-resistive property.
(i) Continue reading What is Semiconductor Strain Gauge? Working Principle, Diagram & Gauge Factor
