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2. Mercury pressure gauge - Wikipedia

   en.wikipedia.org/wiki/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.

3. Pressure measurement - Wikipedia

   en.wikipedia.org/wiki/Pressure_measurement

   Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers and manometers, among other names. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area.

4. McLeod gauge - Wikipedia

   en.wikipedia.org/wiki/McLeod_gauge

   McLeod gauges operate by taking in a sample volume of gas from a vacuum chamber, then compressing it by tilting and infilling with mercury. The pressure in this smaller volume is then measured by a mercury manometer, and knowing the compression ratio (the ratio of the initial and final volumes), the pressure of the original vacuum can be ...

5. Gas meter - Wikipedia

   en.wikipedia.org/wiki/Gas_meter

   An orifice gas meter consists of a straight length of pipe inside which a precisely known orifice plate creates a pressure drop, thereby affecting flow. Orifice meters are a type of differential meter, all of which infer the rate of gas flow by measuring the pressure difference across a deliberately designed and installed flow disturbance.

6. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   Barometer used to measure the atmospheric pressure. Manometer (see Pressure measurement and Pressure sensor) Pitot tube (measures airspeed) Tire-pressure gauge in industry and mobility; For the ranges of pressure-values see: Orders of magnitude (pressure)

7. Blower door - Wikipedia

   en.wikipedia.org/wiki/Blower_door

   There are three primary components to a blower door: a calibrated, variable-speed blower or fan, capable of inducing a range of airflows sufficient to pressurize and depressurize a variety of building sizes; a pressure measurement instrument, called a manometer, to simultaneously measure the pressure differential induced across the face of the ...