A piece of metallic material that acts as an electric contact with a non-metal. It often refers to an instrument designed to measure an electrical response that is proportional to the condition being assessed (e.g. pH, resistivity).
A piece of metallic material that acts as an electric contact with a non-metal. It often refers to an instrument designed to measure an electrical response that is proportional to the condition being assessed (e.g. pH, resistivity).