In its simplest configuration, the Pile Integrity Tester (PIT) performs pulse echo tests. PDI Integrity TesterIt consists of a main unit, one accelerometer and one hand-held hammer. Pile Dynamics has reengineered the traditional PIT with a large and bright color screen, a lighter enclosure and a USB port for data transfer. The model is available with one (PIT-V) or two (PIT-FV) channels of data acquisition, both traditionally wired. The PIT-FV is most often supplied with one accelerometer and one instrumented hammer, but may also be used with two accelerometers.