Abstract: A vortex flow meter includes a measuring tube in which a fluid is carried, a vortex generator provided in the measuring tube for developing a Karman vortex in the fluid, a magnetic field generator generating a magnetic field across the measuring tube downstream of the vortex generator, a pair of electromotive force measuring electrodes provided downstream of the vortex generator for measuring an electromotive force generated by the Karman vortex passing across the magnetic field, a pair of reference electrodes provided at locations upstream and downstream of the electromotive force measuring electrodes, respectively, for measuring a potential at each location, and a detector circuit electrically connected to the electromotive force measuring electrodes and the reference electrodes for calculating the flow of the fluid from the electromotive force and the potential measured by the reference electrodes.

Abstract: A vortex flow meter includes a measuring tube in which a fluid is carried, a vortex generator provided in the measuring tube for developing a Karman vortex in the fluid, a magnetic field generator generating a magnetic field across the measuring tube at the downstream of the vortex generator, a pair of electromotive force measuring electrodes provided at the downstream of the vortex generator for measuring an electromotive force generated by the Karman vortex passing across the magnetic field, a pair of reference electrodes provided at the upstream and downstream of the electromotive force measuring electrodes, respectively, for measuring a potential at each location, and a detector circuit electrically connected to the electromotive force measuring electrodes and the reference electrodes for calculating the flow of the fluid from the electromotive force and the potential measured by the reference electrodes.

Abstract: An apparatus for generating alkali ion water includes an electrolytic cell. At least two electrodes are disposed in the electrolytic cell. A diaphragm disposed in the electrolytic cell extends between the electrodes. A dc voltage is supplied to the electrodes. A mean value of the dc voltage is varied at a given inclination. A first detecting device operates to detect an ac current and generate a signal representative thereof. The dc voltage is derived from the ac current. A second detecting device operates to detect the mean value of the dc voltage in response to the signal generated by the first detecting device. A third detecting device operates to detect an inclination in a variation in the mean value of the dc voltage in response to the mean value of the dc voltage which is detected by the second detecting device. The mean value of the dc voltage is controlled in response to the inclination detected by the third detecting device.