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Evacuated tube collector Direct flow evacuated tube Heat pipe evacuated tube An array of evacuated tube collectors on a roof. Evacuated tube collectors are the most common solar thermal technology in the world. [7] They make use of a glass tube to surround the absorber with high vacuum and effectively resist atmospheric pressure.
This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics. Many industrial, military or otherwise professional tubes were also produced.
This is a list of European Mullard–Philips vacuum tubes and their American ... [18] [19] [20] Y8A 8-pin steel tube base with 2 unused pins, screen grid on top cap ...
Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
Vacutainer tubes may contain additives designed to stabilize and preserve the specimen prior to analytical testing. Tubes are available with a safety-engineered stopper, with a variety of labeling options and draw volumes. The color of the top indicates the additives in the vial. [1] Vacutainer tubes were invented by Joseph Kleiner in 1949. [2]
Finally, the nearly evacuated gas collecting tube is allowed to suck in an outgassed liquid, usually previously heated water, which is offered under atmospheric pressure . The gas collecting tube is weighed for a third and last time containing the liquid yielding the value m c o n t a i n i n g l i q u i d {\displaystyle m_{containingliquid}} .
A Geissler tube is composed of a sealed glass cylinder of various shapes, which is partially evacuated and equipped with a metal electrode at each end. It contains rarefied gases—such as neon or argon , air , mercury vapor, or other conductive substances, and sometimes ionizable minerals or metals like sodium .
ET3 Global Alliance is an American open consortium of licensees that has tried to implement the Evacuated Tube Transport (ET3). It was founded by Daryl Oster in 1997. The stated goal of the consortium was to build a global transportation system using car-sized capsules traveling in 1.5-meter-diameter tubes via frictionless superconductive maglev.