Abstract: A system for communication between sensors in training equipment and electrodes for a defibrillator (AED) or a defibrillator-trainer (AED-T) provides for determining electrode positioning and providing feedback to the user. The training equipment is provided with a non-conductive chest skin, and the communication is wireless and bi-directional. The information from the manikin is generated by a microprocessor with a digital-analog converter. The information signal is transmitted to the sensors in the manikin by use of drivers, which sensors each constitute one half of a non-galvanic coupling, in which the chest skin separates the halves, and the other halves of the non-galvanic couplings are formed by electrodes that are attached to the chest skin, the non-galvanic coupling being in the form of capacitors or coils.

Abstract: A system for detecting an electrode position for a defibrillator on a manikin includes electrical conductive faces that are provided in hidden positions under the manikin skin in locations that correspond to correct and incorrect positions for placement of the defibrillator respectively, and which constitute the respective halves of a capacitor. The faces are connected to a first and a second oscillator respectively, which oscillators emit two different frequencies. A position indicator may be arranged inside the manikin, which indicator will give notification to the user by the use of light sources, e.g., light emitting diodes that shine through the manikin skin, or by activation of a sound signal. A signal analyzing device judges the correctness of the electrode positions via output from the oscillators.

Abstract: A petroleum stream measurement system includes a cell made of non-conductive material for passing a flowing petroleum stream. First and second sensors, spatially arranged with the cell and spaced at a predetermined distance apart, sense the capacitance of the petroleum stream and provides representative signals. A third sensor senses the capacitance of the petroleum stream and provides a corresponding signal. A fourth sensor senses the capacitance of the petroleum stream and provides a signal corresponding thereto. Apparatus receiving the signals from all the sensors derives the distribution of the different fluids within the petroleum stream.