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Envelope Surface Area Analyzer

PMI's Envelope Surface Area Analyzer (ESA) offers a simple, fast, and reliable technique for external surface area measurement - a measurement not readily achieved by static nitrogen adsorption (BET) methods. The ESA's innovative use of flow permeametry combined with its sophisticated self-adjusting viscous-flow controller enables testing of a wide range of powders and other samples, including materials with surface areas of only several square meters per gram.

Surface Area Range0.1 - 10 m2/g
Sample Size1 - 10 cc
Pressure Range0 - 500 psi
Pressurizing Gasnitrogen or any non-corrosive gas
Pressure Transducer Range0 - 500 psi
Mass Flow Transducer Range10 cc/minute - 100 cc/minute
Power Requirements110/220 VAC, 50/60 Hz
Dimensions7" H x 17" W x 17" D
Weight30 lbs

    • Uses nitrogen or other noncorrosive gases; no expensive gas mixtures required
    • Windows-based software handles all control, measurement, data collection, and report generation; manual control also possible
    • Compatible with Windows XP or higher
    • Real-time graphical test display depicts testing status and results throughout operation
    • Nondestructive testing
    • Length of test approximately 5 minutes
    • Wide range of acceptable sample types and sizes
    • Minimal maintenance required


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