A pressure measurement system for measuring pressure in a conduit has a bluff body extending into the conduit. The plate comprises a substrate, an on-press ink andor fountain solution developable photosensitive layer, and an overcoat. The tire defect tester further includes an energy sensor electrically connected to the second electrode and a fault indicator circuit responsive to the energy sensor and configured to indicate the presence of a flaw upon energy above a threshold level being sensed at the second electrode.