Electric conductivity monitor for highly purified water - has electronic switch connecting display and/or actuator to source only, when electrodes are dipped in water

摘要

The water of high purity, whose electric conductivity is monitored, is supplied from a generator, or reservoir. The monitoring is carried out by a display and/or actuating device which is controllable by the electric current between two spaced electrodes, located in the flow path of monitored water. The display and/or actuating device is connected to an electric power source by a switching device only when the two electrodes are dipped in the water. The switching device is preferably actuated mechanically by the tapped water and may be in the form of a water pressure actuated switch. This pressure may be generated by a dam or a throttle in the water flow path, while a differential pressure switch may be used. A mercury switch, or a float switch may be also used in the system. The monitoring system finds typical application in the pharmaceutical industry.