Yokogawa Electric Corporation 240312AAAB7 Elapsed Time Meter

The Yokogawa 240312AAAB7 Elapsed Time Meter is a 3-1/2 inch “Big Look” panel-mount hour meter designed to track accumulated equipment operating hours with a manual reset. Operating at 120V AC, 60 Hz and drawing 3.0 W, it uses a mechanical counter with a multi-digit hours display to record runtime and allow resetting of hours for preventive maintenance in control panels, generators, compressors, motors, pumps, and HVAC systems. This device is part of the Yokogawa 240 Series elapsed time meters (discontinued) and is intended for panel mounting in switchboards or equipment panels to support maintenance scheduling and equipment usage tracking. Common replacements include Yokogawa 240711AAAD Hour Meter (Non-reset) and Omron H7EC Series Digital Hour Meter.