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1
A User's Guide to Vacuum Technology - 88페이지
When a Wheatstone bridge circuit is used to measure the resistance change, the device is termed a Pirani gauge. Alternatively, the temperature change can be measured directly with a thermocouple, in which case it is called a thermocouple ...
2
Lyophilization of Biopharmaceuticals - 128페이지
Some lyophilizers have an additional device, the Pirani gauge, which is sensitive to gas composition. During primary drying, most of the chamber is filled with water vapor. On the other hand, the chamber is essentially filled with nitrogen gas at ...
Henry R. Costantino, Michael J. Pikal,
2005
4
Instrument Engineers' Handbook, Fourth Edition, Volume ... - 800페이지
Pirani Vacuum Gauge The Pirani gauge is a popular example of a thermal vacuum gauge. In this device, a constant current heats a filament that is cooled by the gas present in the vacuum environment. Since the amount of heat transferred ...
5
Industrial Instrumentation & Control,2e - 315페이지
There are two types of thermal conductivity gauges generally used to measure pressure, which are discussed below: (a) Pirani Gauge It consists of two wire filaments. One filament serves as a reference and is sealed in an evacuated glass, ...
6
Electrical Measurements And Instrumentation - 79페이지
The range of Pirani gauge is 2 to 200 microns Hg. Advantages : i) It is easy to operate. ii) The design of Pirani gauge is very simple. Limitations : 1) The calibration of pirani gauge depends on the nature of gas. Generally in Pirani gauge the ...
U.A.Bakshi, A.V.Bakshi,
2009
7
Instrumentation Reference Book - 169페이지
15.3.1.2 The Pirani Gauge (Pirani, 1906) Construction An electrically heated platinum or tungsten wire, operating at a temperature of 320oK, is mounted along the axis of a glass or metal tube, which is connected to the vacuum apparatus.
8
Industrial Control Handbook - 67페이지
In the Pirani gauge, constant energy is supplied to a wire in the vacuum to be measured. As the level of vacuum varies, the differing heat losses cause the temperature of the wire to change. In Fig. 3.20a, the temperature of the wire is sensed ...
9
Measurement and Instrumentation Principles - 313페이지
Alan S Morris. the thermocouple gauge, the Pirani gauge, the thermistor gauge, the McLeod gauge and the ionization gauge, and they are covered in more detail below. Unfortunately, all of these specialized instruments are quite expensive.
10
Vacuum Science and Technology: Pioneers of the 20th Century
Pirani is generally best known for his thermal conductivity vacuum gauge, the “Pirani gauge,” ever since his publication that described it in 1906 with the title “Selbstzeigendes Vakuum-Messinstrument” (“directly indicating vacuum gauge”) (4).