Water quality measurement apparatus and method

A water quality measurement apparatus, comprising:

• an electrochemical cell, comprising a working electrode, a reference electrode, and a counter electrode, wherein the working electrode, the reference electrode, and the counter electrode are configured to be inserted into water to be detected,
• a pH sensor, configured to detect pH values of the water and to provide a pH signal reflecting the pH values of the detected water to a control circuit,
• a temperature sensor, configured to detect temperatures of the water, and to provide a temperature signal reflecting the temperatures of the detected water to the control circuit,
• the control circuit, electrically connected to the electrochemical cell, the pH sensor, and the temperature sensor, wherein the control circuit is configured to provide predetermined adjustable potentials between the reference electrode and the working electrode and to measure electrochemical currents between the working electrode and the counter electrode, to periodically form a current diagram based on the predetermined adjustable potentials and the electrochemical currents,
• a power source, providing power to the control circuit,
• a database, storing predetermined reference diagrams based on various pH values and temperatures, and being in communication with the control circuit, and
• a warning device, being in communication with the control circuit and configured to output warnings, wherein the control circuit triggers the warning device in the condition that the current diagram exceeds the predetermined reference diagram based on the same range of the pH values and the temperature values.