A device for determining the integrity of a greensand mold comprising two or more measurement sensors or plates on a support or supports. The support may comprise a frame straddling a mold production line between the mold machine and the pour station. When the production line is stopped, the measurement sensors or plates are extended to contact opposing sides of a mold and determine electrical characteristics of the mold, including capacitance and inductance. By comparing the electrical characteristics of the mold to the electrical characteristics of recently tested molds in the production line, a determination can be made whether the mold should be used at the pour station.