ESE ES-192UE Line-Frequency Master Clock

The ES-192UE is a compact master clock that uses the AC line frequency as its timing reference, a simple and reliable approach for facilities that do not need GPS accuracy but do want a stable house clock. A six-digit .56-inch yellow LED display shows twelve-hour time, and a date function is built in. An external time sync input keeps it honest, correcting errors up to half a second, so the clock stays trued to a facility reference.

Beyond the display, the ES-192UE serves as a small timing source: it puts out ESE Time Code (TC90) to drive slave displays and a one-pulse-per-second signal for hardware that needs a raw timing edge. It ships as a desktop unit, with an optional 1.75-inch rackmount enclosure (option P) that also allows a four-hour battery backup, plus an optional relay contact closure on the hour or the hour and half hour. Standard power is 110 to 120 VAC, with 220 to 240 VAC and UL options available.