When you exceed the 100-sensor limit, you must purchase a paid license:
| License Size | Typical Use Case | | :--- | :--- | | 500 sensors | Small business network | | 1000 sensors | Medium business | | 2500+ sensors | Large enterprise | prtg free version limitations
In PRTG, a "sensor" is not a device; it is a specific metric. For example, monitoring one server's CPU load, memory usage, and disk space counts as three separate sensors. When you exceed the 100-sensor limit, you must
While the core monitoring works, the free version lacks or restricts: When you exceed the 100-sensor limit