The maximum number of sensors you can monitor with one installation of PRTG mainly depends on the monitoring technology and the monitoring intervals you use:

• SNMP V1/V2, PING, PORT, and HTTP are the recommended sensor types for scenarios with thousands of sensors. With these technologies up to 30.000 sensors are possible.
• For SNMP V3 you will be able to monitor between 60 and 6,000 SNMP V3 sensors with an interval of 60 seconds (depending on request times in your network).
• For WMI monitoring try to keep the number of WMI sensors per probe below 120 sensors (with 60s interval) or 600 sensors (with 300s interval).
• For NetFlow monitoring the maximum number of sensors depends on the traffic pattern, the number of NetFlow packets per second received by the PRTG Probe, as well as the performance of the probe system (see Site Planner Tool).
• Packet Sniffing creates the highest CPU load on the probe system. This technology is only recommended for monitoring of low traffic connections (<50 Mbit/s steady stream). When traffic is often over 10 Mbit/s a dedicated remote probe should be used.

To overcome any limitations mentioned above you should distribute the sensors over two remote probes or more.

For more detailed information please use the Site Planner Tool to plan large installations.