permeametern.

1890 S. P. Thompson in Jrnl. Soc. Arts 12 Sept. 885/2 Permeameter Method. This is a method which I have myself devised for the purpose of testing specimens of iron... For carrying it out a simple instrument is needed, which I venture to denominate as a permeameter.

1931 Bureau of Standards Jrnl. Res. 6 355 The permeameters in general use for commercial magnetic testing have an upper limit of about 300 gilberts per centimeter.

1996 Jrnl. Appl. Physics 80 4548/2 The susceptibility measurements were made with a swept frequency permeameter.

1917 G. A. Shakespear in Rep. & Mem. Advisory Comm. Aeronaut. No. 317. 3 The following is a brief account of a permeability tester which was designed for the rapid testing of balloon and airship fabrics... The apparatus (called a ‘permeameter’ for short) consists of a shallow cylindrical vessel of cast iron, about 13 cm. in diameter [etc.].

1941 D. P. Krynine Soil Mech. iii. 54 The general idea of permeameters or apparatus to determine the coefficient of permeability k in the laboratory is (a) to create a flow of water through a sample of a thickness L [etc.].

1971 B. F. Curtis in R. E. Carver Procedures Sedimentary Petrol. xiv. 353 Although liquid permeameters are used when thought necessary, it is far more common to measure permeabilities using gas as the moving fluid.

2001 Soil Sci. Soc. Amer. Jrnl. 65 1045 In a flexible wall permeameter, a bentonite and two dredging sludge samples were subjected to a chemical potential gradient to monitor water transport.