The decision: watch your critical power without breaking the budget
When your UPS is the last line of defense, the ability to see its status at a glance is not a luxury. If you're shopping for critical power monitoring on a used-equipment budget, the challenge is finding a display that shows the right information and fits your existing setup. The MGE UPS SYSTEMS 102198-0F Critical Power Monitoring System w/ Square D Display goes right at that challenge.
Quick verdict
This is a practical hardware choice for anyone supporting UPS systems or other critical power equipment. At $79.99, it puts a used, fully functional monitoring system in your hands, complete with a Square D display. It won't win beauty contests, but it targets a clear job: keeping an eye on the power gear that keeps your operation running.
Who it suits
It suits data center technicians, facilities engineers, and IT admins who manage UPS units and want a dedicated monitoring interface. If your environment has UPS systems that need visibility at a glance, this is the kind of device that fills that gap without pulling other tools into the workflow.
What stands out from the listed details
The core function is front and center: the system monitors the status of UPS systems and other critical power equipment. That is the whole value proposition. It also includes a Square D display, which gives you a visual interface for checking the power status directly. The application focus is data centers, so it is designed for environments where power continuity is a priority.
Meaningful trade-offs
This is a used unit, and the trade-off is condition. You can expect minor cosmetic wear, scratches, scuffs, or signs of handling or installation. Functionally, the unit is described as fully functional, but you should not expect a pristine, shelf-ready appearance. The other trade-off is that it is a dedicated monitor rather than a full UPS unit, so it needs to be paired with the UPS systems you're overseeing.
Product note
MGE UPS SYSTEMS 102198-0F Critical Power Monitoring System w/ Square D Display

The strongest reason to pick this unit is its purpose: it monitors the status of UPS systems and other critical power equipment, with a Square D display included for direct status checking. The catch is the used condition - minor cosmetic wear and handling marks are possible, so this is a functional choice, not a cosmetic upgrade.
Bottom line
For $79.99, the MGE UPS SYSTEMS 102198-0F Critical Power Monitoring System w/ Square D Display gives data center-minded buyers a dedicated way to track UPS status. Accept the cosmetic wear, and you get a focused monitoring tool for a reasonable price. If you need a no-frills status display for critical power gear, this belongs on your short list.