| Soilmoisture Equipment Corp. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110128026 | HELICAL SENSOR FOR TESTING A COMPOSITE MEDIUM - A sensor is provided for testing a composite medium. The sensor includes a tube and three or more conductors which are wound in a continuously parallel helix around the tube such that the conductors are interleaved. The tube is non-porous and electrically insulative. Both the proximal end and the distal end of the tube are open. Each turn of each conductor is equally spaced from the adjoining turns of the other conductors, and the conductors have a common helical length. The sensor can also include a first cap which seals the proximal end of the tube and a second cap which seals the distal end of the tube such that the interior of the tube is always filled with air. | 06-02-2011 |
| 20110057672 | COAXIAL SENSOR FOR TIME-DOMAIN REFLECTOMETRY - A sensor is provided for testing a porous medium using time-domain reflectometry. The sensor includes an inner conductor, an outer conductor and a ceramic material interposed there-between. The inner conductor runs along a longitudinal axis of the sensor. The outer conductor has a hollow axial interior and is oriented around the inner conductor. The ceramic material is solid, porous, exhibits a known liquid release curve and fills an axial gap between the inner and outer conductors. A dielectric substance can be applied to an exterior surface of the inner conductor to enable the testing of a porous medium which is highly dissipative. The inner conductor can be permeable and have a hollow axial interior. A hydrophobic material can also be interposed between the inner and outer conductors. | 03-10-2011 |
| 20080271521 | Jet-Action Plunger-Based Tensiometer Apparatus - The present invention is embodied in a tensiometer apparatus and process that employs novel techniques for performing the required routine service operation of refilling a sealable measurement chamber of the apparatus with liquid from a reservoir using a novel, piston-type, “jet-action” plunger mechanism. These novel techniques result in a tensiometer which is easier to use, requires no tools for assembly or replacement of parts, and is easier and lower cost to manufacture and maintain. These novel techniques also result in a tensiometer which has improved measurement sensitivity and accuracy, higher reliability and a longer operating lifetime than conventional tensiometers. | 11-06-2008 |
