The phrase "a device which allows" is correct and usable in written English.
You can use it when describing a device's functionality or capability in relation to enabling a specific action or process.
Example: "The new smartphone is a device which allows users to take high-quality photos in low light conditions."
Alternatives: "a device that enables" or "a device capable of".
A solar still is a device which allows obtaining fresh water from seawater or brackish water.
A device which allows reproducible and controlled experiments with knife wounds will be advantageous to forensic investigations.
Among its televisions is a cordless one, plus a device which allows you to change channels by donning a headset and thinking hard about it.
The cell includes a device which allows a continuous gas supply within the electrolyte film covering the metallic specimen under study.
This paper deals with the development of a device which allows an internal recovery in cryogenic plants, reducing their power consumption.
With Bowman at the helm the chances are that Apple may eventually reveal a device which allows a future iPhone to form part of a VR or AR experience that extends beyond apps, but as a means to interact and immerse yourself in media content and gaming streamed from the AppleTV.
Towards the end of his career, he settled for quite a large band with an eclectic repertoire, and many of the fine musicians were featured in solos, a device which allowed him to rest his own lip, naturally not quite what it was after so many decades of hard blowing and no coasting.
Our aim was to create a device which allowed to reintroduce the fibrinolysis measurement in routine practice without disturbing the laboratory workflow, in this work we chose ECLT.
It has evolved from an imaging tool used to investigate microbial surfaces at high resolution in their physiological environment into a lab-on-a-tip device, which allows more quantitative analysis of biological samples (from molecules to cells) in aqueous liquids.
The study has been conducted using a laboratory device, which allows a comprehensive investigation of the coupling phenomena between the main process involved: absorption into a sulfuric solution, transfer to the electrode and anode reaction.
MODEM A MOdulator-DEModulator: a digital device which allows computers to communicate with each other via the telephone network.
