T-M-170 Aquameter™
Explanation:
James Instruments Aquameter ™ uses the latest electronic technology to measure the amount of water within the device’s sensing area. The device has two operating modes: pin mode and search mode. In pin mode, two pins are pushed into the material, creating a high frequency field between these two pins. In search mode, the device uses a high-frequency capacitive sensor to instantly sample large amounts of material. The changes in this electromagnetic field are directly proportional to the dielectric constant of the material through which it passes. Since the dielectric constant of water is almost twice as large as most non-metallic materials, changes in this parameter can be associated with moisture content. After extensive testing of various materials, the relationships between the change in this area and the moisture content were determined. These relationships have been digitized and implemented using the latest microcomputer technology, allowing the user to directly read the moisture content for concrete, masonry, hardwood, softwood, gypsum and brick. The pin method has been found to be most effective in low density materials such as FIR or pine. The search mode was found to be most effective for high density materials such as brick, masonry, gypsum and concrete.
