The Sensor Table

The Sensor Table contains a list of the Sensors that exist for this Panel.

Sensor Table Columns

(You may change the order of the columns by dragging their titles, and sort the rows by clicking one of the sort triangles next to a column title)
User Name
You can directly enter or change the "User Name" for an existing Sensor (double click in the cell).
Pushing the "State" button/icon will change the state of an existing Sensor. Graphic Sensor state column Choose between textual and graphic display of the Sensor state in the Display preferences.
Pushing the "Delete" button will remove the Sensor from the table.
Note that this doesn't remove the Sensor from any files you've saved that contain it. If you load one of those files, perhaps when you restart the program, the Sensor will reappear. You should use one of the "Store to file" options in the "File" menu to save new versions of any files that contain this Sensor.
When checked, the Sensor command and status is inverted. For example, an inverted Sensor means that when the layout sends an "Active" Sensor command, the Sensor becomes "Inactive" to JMRI.
Use Global Delays
When checked, the Sensor will use the system values specified in the "Defaults > Global Debounce Delays..." menu option for the duration which the system waits before it registers the change of state.
See Sensor Debounce Delay below.
Delay to Active/to Inactive
Specify the amount of time in milliseconds that the system waits before registering the state change of a Sensor to either state.
See Sensor Debounce Delay below.

Sensor Table Controls

Along the bottom of the Sensor Table pane are buttons and checkboxes that control its operation.

Push this button to add a new Sensor. For more information see Adding/Editing Sensors.
Show Debounce Delay Information
When checked, the optional Delay columns are shown.
Show Pull-Up/-Down Information
When checked, the optional Pull-Up/-Down columns are shown.
Show State Query actions
When checked, an optional Sensor State "Query" and "Forget" button is shown for each Sensor.
Defaults menu

The "Global Debounce Delays..." menu lets item you configure default values for both delays.

The "Initial Sensor State" menu item lets you choose what state Internal Sensors will display after startup.

Sensor Debounce Delays

Sensor Global Debounce Delays edit pane

The Debounce Delay facility is there to help prevent false triggers of a Sensor being passed into the system and triggering other events in the system.
Such false triggers could be due to a dirty piece of track or electrical interference.

Debounce Delays, activated from the Sensor Table "Defaults > Global Debounce Delays..." menu, allows you to assign a period in milliseconds before the change is registered with the rest of the system. If within that period the state has not changed, the Sensor state will be passed on to the rest the of the system.
However if the Sensors state is different after the timer has finished, then the system will restart the process. This time, after the timer has finished it will check to see if the Sensor is in the same state as it was before it restarted the process. If not, the process is re-started again until the state is the same before and after the timer is run.
You can set different delays for a change to Inactive and a change to Active.