ionization gauge การใช้

• A source can work without any magnetic field like in a hot filament ionization gauge.
• Ionization gauge calibration is very sensitive to construction geometry, chemical composition of gases being measured, corrosion and surface deposits.
• This ion current differs for different gases at the same pressure; that is, a hot-filament ionization gauge is composition-dependent.
• The composition of gases at high vacuums will usually be unpredictable, so a mass spectrometer must be used in conjunction with the ionization gauge for accurate measurement.