Edit Sensor and Channel Settings

In PRTG, it's the sensors which perform the monitoring. Each sensor has one or more channels through which it gets the actual data. For each sensor, you can configure general settings, notifications and the different channels. All of these settings are available in the tabs of a sensor's detail view.

To enter the sensor detail view, first click on "Sensors" in the main menu to view the sensor list and then click a sensor (or right-click a sensor and select "Details..." from its context menu).

"Settings" Tab

In the "Settings" tab, you can enter/edit the following information:

  • Basic settings, such as Name, Tags, Priority.
  • Settings that configure the behavior of the sensor and that depend on the sensor type (e.g. the URL for an HTTP sensor).
  • Various settings that can optionally be inherited from the parent object (e.g. SNMP settings, interval, authentication settings). See Inheritance of Settings for more details.
  • Here you can also select the "Primary Channel" from the channels available to this sensor. The primary channel for this sensor will always be displayed in graphs and overviews. It can also be used to trigger notifications.
  • Please note: Warning and Error Limits are based on the sensor's channels and can be changed in the "Channels" tab.

"Notifications" Tab

You can use a sensor to trigger many different notifications. Please see general section Notifications for more details on creating notification triggers.

"Channels" Tab

In the "Channels" tab, you can specify the settings for every single channel of a sensor. First, choose the desired channel in the "Select Channel" area. The channels available in this selection box depend on the sensor you are editing. You can only choose one channel at a time.

The settings below the "Edit Channel" header are channel specific and vary slightly, depending on the selected channel. You can change the channel's name in the "Name" field. The "ID" is used as an internal channel identifier and cannot be changed.

With the check boxes available at "Display", you can select whether this channel should be displayed in charts, in tables, or both. This way, you can make your charts and tables clearer, by hiding the data of channels that do not interest you.

With the settings "Line Color", "Line Width", "Decimal Places", and "Vertical Axis Scaling", you can specify how the graphs for this channel are to be displayed. If you don't like the automatic settings, please change colors, line width, scaling, etc. to suit your needs.

The field "Spike Filter" is only available if applicable for the channel. If enabled, you can enter an upper and/or a lower limit. With the existing data, all values above the upper limit and below the lower limit will be ignored. This option is recommended only if you repeatedly receive obviously wrong data (e.g. enormously high or far too low values) due to an error in data transmission or due to incompatibilities with the device your are monitoring.

The field "Limits" is only available if applicable for the channel. If enabled, you can enter Upper and Lower values for both an Error and a Warning Limit. If one of these limits is reached for this channel, the whole sensor is then set to Error or Warning status (as specified). Additionally, you can also enter an Error Limit Message and a Warning Limit Message which will be added to the respective status. In combination with the settings in the "Notifications" tab you can setup PRTG to notify you when a sensor reaches a limit.


For all other tabs in a sensor's details view, see table overview "Page Header and Tabs" in section Web Interface.