A barometer in which one end of a graduated glass tube is immersed in a cup, both cup and tube containing mercury.
Related Terms |
PLUMMET
A loose-fitting metal plug in a tapered rotameter tube which moves upward (or downward) with an increase (or decrease) in fluid flow rate upward through the tube. Also known as float.
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PITOT TUBE
An instrument that measures the stagnation pressure of a flowing fluid, consisting of an open tube pointing into the fluid and connected to a pressure-indicating device. Also known as impact tube.
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PITOMETER LOG
A log consisting essentially of a pitot tube projecting into the water, and suitable registering devices.
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PISTON CORER
A steel tube which is driven into the sediment by a free fall and by lead attached to the upper end, and which is capable of recovering undistorted vertical sections of sediment.
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PIPE
A tube made of metal, clay, plastic, wood, or concrete and used to conduct a fluid, gas, or finely divided solid.
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PHOTOEMISSIVE TUBE PHOTOMETER
A photometer which uses a tube made of a photoemissive material; it is highly accurate, but requires electronic amplification, and is used mainly in laboratories.
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PACKED TUBE
A pipe or tube filled with high-heat-capacity granular material; used to heat gases when tubes are externally heated.
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PACHUCA TANK
Air-agitated, solidliquid mixing vessel in which the air is injected into the bottom of a center draft tube; air and solids rise through the tube, with solids exiting the top of the tube and falling through the bulk of the liquid.
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OUTPUT-METER ADAPTER
Device that can be slipped over the plate prong of the output tube 385 output-meter adapter output power of a radio receiver to provide a conventional terminal to which an output meter can be connected during alignment.
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OUTGASSING
The release of adsorbed or occluded gases or water vapor, usually by heating, as from a vacuum tube or other vacuum system.
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