SoTimerSensor(3) on Linux
The text 9ff2c6e0810b, as Debian 8 (Jessie) shipped it.
The SoTimerSensor class is a sensor which will trigger at given intervals. Use sensors of this class when you want a job repeated at a certain interval, without explicitly needing to reschedule the sensor (i.e. SoTimerSensor automatically re-schedules itself after it has been triggered).