Abstract: A device is disclosed for continuous in vivo measurement of blood glucose concentrations in arterial blood. A quantity of glucose oxidase enzyme is confined within at least one elongate double-lumened tube by means of a semi-permeable membrane tubule permeable to permit diffusion of glucose from blood passing through an inner lumen of the tube into an outer lumen in which the enzyme is confined. The enzyme catalyzes the oxidation of glucose to produce heat. The tube is insulated so that the heat produced by the glucose oxidation is transferred to the blood flowing through the inner lumen. Either micro-thermocouples or solid state temperature sensors are positioned to measure the increase in temperature of the blood to produce a signal that is a function of the glucose concentration in the blood.

Abstract: An underwater sensing system has a trunk cable that transmits a plurality clock signals from its first end to its second end. A plurality of signal handling nodes are installed successively along the trunk cable in a spaced apart relationship. Each of a plurality of linear sensor arrays extend from one signal handling node. Each sensor in the sensor arrays receives the clock signals and generates a data output signal in response thereto at specifically ordered time sampled intervals based on a count of the clock signals. The data output signals are transmitted to the one signal handling node associated with the sensor array. At each of the signal handling nodes, a multiplexer interleaves the data output signals received from its sensor array in a continual throughput, time-division multiplexed fashion with concatenated data output signals received from the next successive signal handling node located further from the first end of the trunk cable.