Abstract: A material is laced with Radio Frequency Identification (RFID) tags at a known concentration of RFID tags per unit of material. Subsequently, if an interrogation of the RFID tags reveals a reduced concentration of RFID tags in the material, then a conclusion is drawn that the material has been diluted.

Abstract: A sensor for measuring density of a liquid that comprises a float unit having a sealed hollow casing that contains a first magnet and a strain-gauge unit having a sealed hollow casing that contains a strain gauge and a second magnet arranged coaxially to the first magnet. Coaxiality of the magnets is provided by means of a guide rod installed on the casing of the strain-gauge unit and used to guide the float unit by inserting the guide rod into the central opening of the float unit casing. A characteristic feature of the sensor is that changes in the density of the liquid that cause displacement of the float cause detectable deformations of the strain gauge via forces of magnetic interaction between the first and second magnets without physical contact between the magnets. Since the elements of the sensor are located in sealed casings, they are not subject to damage and do not require maintenance.

Abstract: A hydrometer for determination of immunoglobulin content of mare colostrum comprises a container having a top wall, side walls and an open bottom. An elongate, emergent stem is carried by and projects from the top wall, and the stem is provided with a scale along its length to indicate the specimen specific gravity when the device is immersed in water. A partition wall for the container is positioned between the top wall and the open bottom dividing the container into an upper air chamber and a lower specimen chamber. A removable closure member is used for the open bottom of the container. The closure member is sized to adjust the specimen chamber to a predetermined volume when fully inserted in the open bottom of the container. A bleed vent contained in the side wall of the closure member, allows excess specimen and air bubbles to escape.

Abstract: Method and apparatus to estimate the weight of the trees and logs in a stand of trees before harvesting to maximize the efficiency of aerial logging are disclosed. A hydrometer that has a chamber which accepts a small known volume core from the tree determines the density thereof. Statistical modeling permits weight estimations for the entire stand based on this density and other conventional information about the stand of trees.

Abstract: A method of measuring fat content of meat includes the steps of immersing a meat sample in a liquid, and detecting the amount of displacement of the liquid by the meat sample, the variance of such displacement as a function of fat content being predetermined, whereby the fat content is determinable from the detected displacement.

Abstract: A device for the automatic addition of corrosion inhibitor into an automobile coolant system when the coolant mixture is diluted by water having an undesirable level of corrosiveness. The device is in the form of a hydrometer having a hollow stem adapted to receive a quantity of a corrosion inhibitor and having openings in the stem wall allowing contact of the liquid in the coolant system with the corrosion inhibitor when the specific gravity of the coolant liquid decreases below a predetermined level.

Abstract: An apparatus and method are provided for verification of declared contents in mixed solids, blended textiles, certain pure solids, and other solid substances. The apparatus is assembled from laboratory items and utilizes liquids and instruments. The method requires the measurement of changes in chain length in a chain suspended from the bottom of a float, and appliable values substituted in an equation which utilize densimetric principles to achieve a comparative presentation of values for verification.

Abstract: Apparatus for measuring and monitoring the state of activated sludge in the continuous treatment of waste waters or sewage. A suspensoid is produced by clarifying a quantity of the sludge-charged liquid, and the apparent weight of the sludge relative to the suspensoid is derived and is used as an indication of the state of the treatment installation. The apparatus is easily transportable and can be used on site.