WebThe Granville-Phillips® 307 Bayard-Alpert Vacuum Gauge Controller measures pressure, and utilizes pressure-related outputs to control a variety of vacuum system functions and processes. To fit a wide range of applications, the 307 Bayard-Alpert Vacuum Gauge Controller is available in a variety of configurations and prices. WebBayard-Alpert (hot cathode) gauges provide pressure measurement based on the ionization of gas molecules by a constant flow of electrons from a filament. The number of ions created is directly proportional to the density of molecules. The ions are collected and measured by a vacuum gauge controller and converted to pressure based on

Pirani gauge - Wikipedia

WebGranville-Phillips® 355 Micro-Ion® Hot-cathode Bayard-Alpert Ionization Vacuum Gauges are the smallest Bayard-Alpert style gauges. They are more rugged and wider range than glass gauges. In addition, they generate less heat and provide greater burnout resistance. Small size that allows for easy installation in complex, tightly packed vacuum ... The most common ion gauge is the hot-cathode Bayard–Alpert gauge, with a small collector inside the grid. [1] A glass envelope with an opening to the vacuum can surround the electrodes, but usually the nude gauge is inserted in the vacuum chamber directly, the pins being fed through a ceramic plate in … See more The hot-filament ionization gauge, sometimes called a hot-filament gauge or hot-cathode gauge, is the most widely used low-pressure (vacuum) measuring device for the region from 10 to 10 Torr. It is a See more A hot-cathode ionization gauge is composed mainly of three electrodes, all acting as a triode, wherein the cathode is the filament. The three electrodes are a collector or plate, a See more • Electron ionization • Ionization gauge • Vacuum See more A regulated electron current (typically 10 mA) is emitted from a heated filament. The electrons are attracted to the helical grid by a DC potential of about +150 V. Most of the electrons pass through the grid and collide with gas molecules in the enclosed volume, causing a … See more • Bayard–Alpert (uses sealed tube). • Nude gauge (uses the vacuum chamber to make a complete seal). See more • How does an ion gauge work? • Hot filament ionization gauge tubes • U.S. Patent 4792763 - Hot cathode ionization pressure gauge • U.S. Patent 5373240 - Hot-cathode ionization pressure gauge including a sequence of electrodes arranged at a … See more lychnophorinae

Bayard-Alpert Ionization Gauges

Webin units of pressure. Inasmuch as the pressure indication is linear, the hot cathode Bayard-Alpert gauge is generally considered the most accurate continuous indicator for pressures below 1 x 10-3 Torr. The low end of the operating range of a Bayard-Alpert gauge is determined by the X-ray limit of this type of gauge. WebFeatures Full range gauge combining Bayard-Alpert and Pirani technologies provides wide measurement range from 3.8 x 10 -10 Torr to atmosphere (5 x 10 -10 to 1013 mbar) Pirani interlock protects Bayard-Alpert sensor from premature burnout and contamination effects from high-pressure operation kingston chamber of commerce ontario