UV Resources‘ new Lamp Hour Meter alerts building engineers when it’s time to replace ultraviolet-C (UV-C) germicidal lamps to ensure the system continues enhancing indoor environmental quality and HVAC/R efficiency. The meter uses a standalone timer to monitor lamps, giving LED and signal reminders for replacement, and has a dynamic memory in case of power loss. The meter is powered by a 24-volt wall adapter but can also be hardwired into a building management system.