Device for measuring the free chloride content of water

摘要

An amperometric sensor circuit for measuring chlorine concentration in water. The circuit includes first and second working electrodes coated with a hydrophilic membrane. A power supply and biasing circuit is configured to deliver a generally constant voltage between the first working electrode and a reference electrode and to generally deliver a constant current between the second working electrode and a counter electrode. A measurement circuit measures the current between the counter electrode and the first working electrode. A processing circuit is provided for determining the chlorine concentration based on the current measured by the measurement circuit.

主权项

1. Device for measuring the chlorine content of a water, said device comprising at least one amperometric sensor of chlorine comprising a reference electrode, a counter electrode, a first working electrode and a second working electrode, said reference electrode and said first working electrode being connected to a voltage generator for generating a difference in electric potential, said counter electrode and said first working electrode being connected to a current measuring device for measuring electric current, said counter electrode and said second working electrode being linked to a current generator for generating electric current, said device further comprising a membrane coating said first and second working electrodes, said membrane being in contact with said working electrodes and comprising a gel permeable to hypochlorous acid (HOCl) and to hypochlorite ions (OCl−).