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  2. Barometer - Wikipedia

    en.wikipedia.org/wiki/Barometer

    Using vacuum pump oil as the working fluid in a barometer has led to the creation of the new "World's Tallest Barometer" in February 2013. The barometer at Portland State University (PSU) uses doubly distilled vacuum pump oil and has a nominal height of about 12.4 m for the oil column height; expected excursions are in the range of ±0.4 m over ...

  3. Torricelli's experiment - Wikipedia

    en.wikipedia.org/wiki/Torricelli's_experiment

    The experiment uses a simple barometer to measure the pressure of air, filling it with mercury up until 75% of the tube. Any air bubbles in the tube must be removed by inverting several times. After that, a clean mercury is filled once again until the tube is completely full. The barometer is then placed inverted on the dish full of mercury.

  4. Pirani gauge - Wikipedia

    en.wikipedia.org/wiki/Pirani_gauge

    A special form of the Pirani gauge is the pulsed Pirani vacuum gauge where the sensor wire is not operated at a constant temperature, but is cyclically heated up to a certain temperature threshold by an increasing voltage ramp. When the threshold is reached, the heating voltage is switched off and the sensor cools down again.

  5. Mercury pressure gauge - Wikipedia

    en.wikipedia.org/wiki/Mercury_pressure_gauge

    The tube is sealed during manufacture with the sealed end containing a vacuum. [1] Mercury is a useful material to use in a manometer because of its high density. This means that a much shorter column is needed compared to water. [2] For instance, the pressure represented by a column of 100 mm of water is just under 7.4 mm of mercury . [3]

  6. 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 ...

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  8. Worthington Enterprises - Wikipedia

    en.wikipedia.org/wiki/Worthington_Enterprises

    Worthington Industries was founded in 1955 by John H. McConnell, a steel salesman.McConnell saw an opportunity for custom-processed steel and purchased his first load of steel by borrowing $600 against his 1952 Oldsmobile.

  9. Get the Moses Lake, WA local weather forecast by the hour and the next 10 days.

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