| Name | Description | | Version | Date | .NET | Downloads | | Pricing |
| ADAuthenticate | Tries to auhenticate a user on the AD. | | 20.3.1.1 | 2020-07-14 | v4.7 |    | Download | Free |
| ADGroupUserCount | Retuns the number of users in an Active Directory group | | 18.4.1.1 | 2018-12-09 | v4.6.1 |   | Download | Free |
| CheckPTFVersion | Compare your local PTF custom sensors with the last available versions | | 22.4.1.3 | 2022-10-04 | v4.7.2 |  | Download | Free |
| CheckTimeSNMP | Time difference between snmp device and probe in seconds | | 13.1.2.2 | 2014-09-22 | v2.0 |  | Download | Free |
| CompareTime | Compare the UTC time of the specified computer with the local UTC time | | 8.0.1.1 | 2013-10-25 | v2.0 |  | Download | Free |
| ContactState | State of a dry contact connected to a serial port | | 14.2.1.2 | 2014-04-02 | v4.0 |  | Download | Free |
| CSVExport | Historical sensor data from your PRTG server | | 21.3.1.20 | 2021-07-31 | v4.7 | | Download | Free |
| DaysUntil | Number of days until the given end date | | 14.4.2.2 | 2014-11-20 | v4.0 |  | Download | Free |
| DNSDynamic | Keep the IP of your dynamic DNS account in sync with your public IP | | 15.3.1.6 | 2015-08-17 | v4.0 | | Download | Free |
| EmailCount | Count the number of email messages in the inbox of a given mail account | | 18.2.1.4 | 2018-05-01 | v4.6.1 | | Download | Free |
| EventlogReader | Value of the most recent event log entry
for the given source. See also the EventlogReaderXML sensor | | 12.2.1.1 | 2013-10-25 | v2.0 | | Download | Free |
| ExternalIP | ISP-assigned IP address of the Probe | | 23.1.1.2 | 2023-03-21 | v4.7 | | Download | Free |
| FTPFileTime | Returns the file age in minutes compared to the probe | | 15.2.1.1 | 2015-05-04 | v4.0 | | Download | Free |
| HTTPContent | HTTP content changes | | 8.0.1.1 | 2013-10-25 | v2.0 | | Download | Free |
| HTTPFailoverSite | Check if your failover website is responding | | 13.4.2.3 | 2013-11-07 | v4.0 | | Download | Free |
| INIFileValue | Ini-file field value | | 14.4.1.2 | 2014-12-18 | v4.0 | | Download | Free |
| ITSCompare | Compares the probe time with an Internet Time Server | | 16.2.1.4 | 2016-05-08 | v4.0 | | Download | Free |
| LogfileReader | Searches a log file for a specified string | | 14.3.1.3 | 2014-07-07 | v4.0 | | Download | Free |
| NetworkFileCount | Number of files on a server\share | | 18.1.1.4 | 2018-01-29 | v4.5 | | Download | Free |
| PingDelayedUp | Remain down for the given number of seconds before returning an Ok state | | 14.3.1.2 | 2015-04-16 | v4.0 | | Download | Free |
| Pingdom | Status from a Pingdom sensor | | 15.2.1.5 | 2015-05-16 | v4.0 | | Download | Free |
| PingMacAddress | Pings a MAC address | | 14.2.1.3 | 2014-04-24 | v4.0 | | Download | Free |
| PingSubnet | Number of devices responding to Ping on a subnet | | 14.2.1.1 | 2014-05-25 | v4.0 | | Download | Free |
| PingWarning | Goes into a warning state if no reply is received | | 14.2.1.2 | 2014-04-02 | v4.0 | | Download | Free |
| PortState | Number of seconds a TCP or UDP port is not responding | | 12.3.2.2 | 2013-10-25 | v2.0 | | Download | Free |
| PredictValue | Returns the predicted value of a sensor on the given date | | 20.4.1.2 | 2020-12-23 | v4.7 | | Download | Free |
| ProcessCount | Counts the number of named processes running on a computer | | 15.4.1.1 | 2015-12-15 | v4.0 | | Download | Free |
| PSx64 | Executes a Powershell script in 64 bit mode | | 18.1.1.6 | 2018-01-09 | v4 | | Download | Free |
| ReadFile | Reads a file into memory and returns the number of bytes/sec | | 13.2.1.1 | 2013-10-25 | v2.0 | | Download | Free |
| SensorStatus | Goes into a warning state if a sensor status has changed | | 20.4.1.4 | 2020-12-23 | v4.7 | | Download | Free |
| ServiceStatus | Status of a Windows service | | 15.2.1.2 | 2015-05-17 | v4.0 | | Download | Free |
| SingleSensorStatus | This sensor returns a warning state if the given sensor status has changed into one of the given statuses | | 25.1.1.1 | 2025-03-03 | v4.7.2 | | Download | Free |
| SNMPGet | Gets a OID value and optionally removes characters | | 13.4.1.1 | 2013-10-10 | v4.0 | | Download | Free |
| TLDomainExpiration | Number of days before a domain registration expires | | 24.4.1.35 | 2024-11-14 | v4.7 | | Download | Free |
| USBDevices | Number of USB storage devices connected | | 9.0.1.1 | 2013-10-25 | v2.0 | | Download | Free |
| UserLoggedin | Number of users loggedin on the specified computer | | 21.4.2.9 | 2021-12-22 | v4.7 | | Download | Free |
| WinCertExpiration | Number of days before your certificate expires | | 16.3.1.6 | 2016-08-31 | v4.0 | | Download | Free |
| WinOSVersion | OS verson from the specified computer | | 14.3.1.2 | 2014-07-07 | v4.0 | | Download | Free |