Isoteniscope

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An Isoteniscope is a device used to measure the vapor pressure of liquids. It consists of a submerged manometer and container holding the substance whose vapor pressure is being measured. The open end of the manometer is then connected to a pressure measuring device. A vacuum pump is used to adjust the pressure of the system and purify the sample.

Sketch of Isoteniscope.svg

Various ASTM vapor pressure measurement standards use the isoteniscope.[1][2] Dr. Bertrand of the Missouri University of Science and Technology offers an interactive animation of a lab procedure using the isoteniscope on his web page.[3]

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