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Looking to the toxicity quotient of lithium for human well being, a simple electrochemical sensor based on self assembled monolayer with physically adsorbed 6,6'‐dibenzyl‐14‐crown‐4 ether onto a screen printed gold sensor electrode is proposed, where changein voltammetric current signal of redox probe as a mediator, is the basis of transducer. The sensor is responsive to 0.1 mM to 2.5 mM lithium and selective over potassium, calcium and large excess of sodium in solution. The system is promising for real‐time selective recognition of lithium in a label free assay and for point‐of‐care lithium level monitoring in clinical and biomedical fields. [ABSTRACT FROM AUTHOR]

Abstract: Following the development of a dual-sensor horizontal penetrometer for the simultaneous measurements of soil water content and strength, an electrical conductivity (EC) sensor with a 4-ring Wenner-array was incorporated into the cone of the horizontal penetrometer. In order to overcome the cross-modulation of signals from water content and EC sensors, two filters with specific pass-bands were connected in each circuitry. Both laboratory calibration and field test were conducted, and the experimental results showed that the improved technique could provide more informative data to interpret soil physical conditions at field-scale. [Copyright &y& Elsevier]

The authors consider the detection of cracks appearing close to the rivets in ageing riveted lap joints of aircraft structures, using the eddy current (EC) technique. As the presence of the rivets perturbs the interpretability of the defect EC signatures, the authors propose to fuse the data provided by oriented field EC sensors used in different operating modes. Different fusion rules are considered and the performances of defect detection are then characterized with receiver operating characteristic curves. [ABSTRACT FROM AUTHOR]