The ASCO-labeled Yokogawa 240311AAAB7JBZ is a 3-1/2-inch, non-resettable elapsed time meter (hours meter) intended for panel mounting in 120 V AC, 60 Hz systems, drawing about 3.0 W. It features a New Big Look face with ASCO branding and a four-stud mounting pattern (2-1/2" x 3-1/2" opening) for secure installation and a dedicated HOURS scale for straightforward hour tracking. Used to log accumulated running hours on equipment such as generators, compressors, and other industrial machinery, the non-reset design preserves total hours across power cycles, aiding maintenance scheduling and service intervals.
