APPARATUS FOR AUTOMATIC AND CONTINUOUS PLOTTING OF ABSORPTION-DESORPTION ISOTHERMS EMPLOYED FOR DETERMINING THE MICROSTRUCTURE OF POROUS BODIES

摘要

The apparatus essentially comprises a variable-volume enclosure, a pressure transducer in communication with said enclosure, a vacuum line, at least one pipe for the admission of adsorbable gases or vapors, a pipe for the admission of non-adsorbable gases and a sample-holder. Said pipes and said sample-holder are also in communication with said enclosure but can be cut-off by means of cocks. An analog computer is connected electrically to the transducer and to the enclosure and a cartesian-coordinate plotter is connected to the computer to provide absorption-desorption isotherms. The enclosure, the transducer, the analog computer and the sample-holder are maintained at constant temperature.