porometer Articles

  • And the Award for Most Creative Use of a Porometer Goes to…

    Decagon employees have found some novel uses for the porometer over the years.  Since the sensor head measures stomatal conductance simply by determining vapor flux, they’ve clamped it on everything from fingers to house wrap to raincoats.  But Jan Narciso and her colleagues at the USDA in southern Florida have now “clamped” it on something even bigger…a ...


    By METER Group, Inc.

  • Gore-Tex, House Wrap and Stomates

    Want to develop an appreciation for Gore-Tex? All you need is five minutes in a rubber raincoat. But how do you know whether the North Face knock-off you've just purchased in China for a ridiculously low price is Gore-Tex or rubber? If you're a Decagon researcher, you dash back to your hotel room and clamp a porometer onto the fabric. Decagon's porometer was designed to measure stomatal ...


    By METER Group, Inc.

  • Calculations used in porometry application notes

    A porometer measures gas flow as function of an applied pressure. Typical curves for the wet and dry curve for a filter or membrane are shown in figure 1 below. The wet curve is measured to determine the pore sizes, the dry curve is needed for the calculation of both the mean flow pore size, smallest pores and the gas permeability. As one can read in the application note about the determination ...


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