The phrase "a device on which" is correct and usable in written English.
It can be used when describing a specific type of device that serves a particular function or purpose.
Example: "The tablet is a device on which users can read e-books and browse the internet."
Alternatives: "a tool for which" or "an apparatus that".
For Xiaomi, the smartphone is a device on which to sell more profitable wares.
A device on which the customer doesn't separate the hardware and software experience.
To help them guide each other to a rendezvous, they have a device on which they can scrawl symbols that appear on the other's screen.
The Hover-bed is a device on which a patient is supported with the minimum of body contact and surface pressure.
For Mr. Winick, having a 15-year-old fall in love with his stepmother was intended not as a grand statement but as a device on which to hang numerous comic possibilities.
A fugitive running from the law and running after the real villain is not an idea; it's just a device on which to hang things -- locales (Miami is really wasted in the pilot), oddball types, hot-button issues and, above all, spectacular stunts -- things that have only an opportunistic relationship to a plot whose only point is to keep itself going.
The recordings were being taken for six years from 2009, before Thomas was caught when a female colleague discovered a recording device, on which there were images of Thomas' face in the process of hiding the device.
Hers is a sexual wildness born of incest (a literary device on which I would like to declare an international moratorium), but the eccentric Pauline, in "Family of Shadows," has no such impetus.
Is there a portable device on which all these CD's can be stored and indexed?
For in this case it seems that we would have little hope of building a computing device on which they could be concretely implemented.
His troubles began with a 2007 presentation he gave in the United States, during which he claimed that a heart device on which he had previously been the lead researcher was dangerous and that its manufacturer, Boston-based NMT Medical, covered up two studies that were unfavorable to the device.
