With dimensions of 62 x 47 x 19mm (2.4 x 1.8 x 0.75in) TR-5i series loggers may be small, but they are built to last. In addition to the LCD on the front panel, the built-in alarm LED makes warnings easily visible. TR-55i-P not only counts pulse signals output from sensors, measuring devices, and control devices, but, records them at set regular intervals.
