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2. Hot-filament ionization gauge - Wikipedia

   en.wikipedia.org/wiki/Hot-filament_ionization_gauge

   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 −3 to 10 −10 Torr. It is a triode, with the filament being the cathode. Note: Principles are mostly the same for hot-cathode ion sources in particle accelerators ...

3. Pressure measurement - Wikipedia

   en.wikipedia.org/wiki/Pressure_measurement

   Checking tire pressure with a spring and piston tire-pressure gauge. Pressure measurement is the measurement of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area. Many techniques have been developed for the measurement of pressure and vacuum.

4. Mercury pressure gauge - Wikipedia

   en.wikipedia.org/wiki/Mercury_pressure_gauge

   Mercury pressure gauge. An open (differential) mercury pressure gauge. A mercury pressure gauge is a type of manometer using mercury as the working fluid. The most basic form of this instrument is a U-shaped glass tube filled with mercury. More complex versions deal with very high pressure or have better means of filling with mercury.

5. Pirani gauge - Wikipedia

   en.wikipedia.org/wiki/Pirani_gauge

   The Pirani gauge is a robust thermal conductivity gauge used for the measurement of the pressures in vacuum systems. [1] It was invented in 1906 by Marcello Pirani. [2] Marcello Stefano Pirani was a German physicist working for Siemens & Halske which was involved in the vacuum lamp industry. In 1905 their product was tantalum lamps which ...

6. Budenberg Gauge Company - Wikipedia

   en.wikipedia.org/wiki/Budenberg_Gauge_Company

   The Budenberg Gauge Company was founded in 1918. The original parent company was Schäffer & Budenberg founded in 1850 by Bernhard Schäffer [de] and Christian Friedrich Budenberg [de] in Prussia. The Budenberg Gauge Company is now based in Irlam, Salford. The company is renowned for the manufacture of high quality pressure gauges, thermometers ...

7. LSWR O2 class - Wikipedia

   en.wikipedia.org/wiki/LSWR_O2_class

   The second of William Adams' 0-4-4T designs, the O2 class was a development of his previous T1 class of 1888. [1] The brief behind the design was to create a locomotive capable of mixed-traffic operations, a characteristic dictated by the relatively small wheel diameter and smaller cylinders, effectively to replace the obsolete Beattie 0298 ...