The TimeMark Model 18 is a 3-phase monitor with adjustable trip and restart delays that detects phase loss, low voltage, and phase reversal conditions. Available in seven voltage models spanning 120 to 480 VAC, including 50 Hz, 60 Hz, and 400 Hz versions, it serves a wide range of industrial applications. The unit features automatic reset capability with adjustable trip delays from 1 to 30 seconds and restart delays from 1 to 300 seconds, housed in a NORYL plastic enclosure. It is UL Recognized in the U.S. and Canada and backed by a five-year unconditional warranty.