The phrase "automatically switch off" is correct and usable in written English.
It can be used in contexts where a device or system is designed to turn off by itself after a certain condition is met.
Example: "The device is programmed to automatically switch off after 30 minutes of inactivity."
Alternatives: "turn off automatically" or "shut down by itself".
Across greater Tokyo, the world's largest metropolis, "intelligent machines", from subway ticket machines to building escalators, automatically switch off when not in use.
They can be switched on during the appropriate half-cycle of voltage (anode positive) and will automatically switch off when the polarity reverses.
These include energy-saving mains controllers which automatically switch off TV and PC peripherals (printers, monitors etc). when you turn off the machine.
These handsets automatically switch off the radio after being idle for 17 seconds, a tactic used by all handsets and often with a similar timeout value.
The museum has already fitted wiring for motion and daylight sensors that will be installed before the year is out, so the galleries' lights automatically switch off during quiet periods.
When he died, he had a patent pending for a control that would automatically switch off an overheating blanket; he had hoped to provide the device to Japanese manufacturers.
Stop-start automatically switches off a car's engine when the driver selects neutral during, say, a long wait at traffic lights; as soon as first gear is selected, the engine is automatically restarted.
But the Claire Perry approach where adult material is automatically switched off isn't necessary.
Once the two of you meet up, Jink automatically switches off to save your phone's battery power.
In the case, if there is no person present, the lights can be automatically switched off to save energy and ultimately to reduce costs.
On the plus side, the excellent Davos shuttle buses have televisions on the dashboard, which are automatically switched off when the vehicle is moving.
