Lascar EL-USB-5 Counter, Event & State USB Data LoggerThe Lascar EL USB 5 is a Data Logger that functions as an event logger, state change logger and event counter. The data logging capability allows it to record events (detecting an input and storing the time and date of occurrence), record state changes (similar to an event but also recording when the input reverts back to normal) and count events (count the number of events that happen in a time period, without any individual event time or date