Prepositions with device

How prepositions work with device

Different prepositions with device express different meanings. Device for is common for purpose, while device in and device on often depend on location or context.

Quick answer

Which prepositions are natural with device?

Use device for to show purpose. Use device to before an infinitive. Device of usually means belonging to a type or era. In device and on device are usually adjuncts showing location, not fixed combinations.

This is a useful device for measuring temperature.
They invented a device to detect leaks.
The scanner is on the device already.
The app stores data in the device memory.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
device for + purpose

Showing what a device is used for

Use for to explain the function or purpose of a device.

They created a device for communication in remote areas.
This is a device for tracking sleep patterns.
2
device to + verb

Explaining a device's function

Use an infinitive after device to describe what the device does.

Engineers designed a device to reduce noise in factories.
She bought a device to monitor heart rate during exercise.
3
device of + noun

Classifying or describing a device

Device of is used in descriptive phrases about type, ownership, or period.

It was a device of the nineteenth century with mechanical parts.
The tool became a device of modern medicine over time.
4
on the device

Referring to a surface or platform

On device often functions as a location phrase, not a fixed prepositional pattern with device.

The update is installed on the device already.
You can watch videos on the device without internet access.
5
in the device

Referring to the inside of a device

In device usually appears as in the device when talking about internal parts or storage.

The battery in the device needs replacing.
Data is stored in the device memory.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
device for
a device for measuring pressure
shows purpose or use
device to
a device to detect smoke
describes function with an infinitive
device of
a device of the digital age
descriptive classification
on the device
The files are on the device.
location or platform
in the device
There is a fault in the device.
inside the device

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using device for with a verb directly

After for, use a noun or -ing form, not a bare verb.

✕ a device for detect leaks ✓ a device for detecting leaks

Confusing device to and device for

Device to takes a verb. Device for takes a noun or gerund.

✕ a device to noise reduction ✓ a device for noise reduction

Treating in device as a fixed phrase

In usually introduces a location or container meaning.

✕ This is common in device. ✓ This is common in the device.

Quick practice

Choose the expression that matches the intended meaning.

1. They built a device ___ measuring air quality.
2. She needs a device ___ monitor blood sugar.
3. The photos are stored ___ the device.

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Frequently asked questions

Is device for more common than device to?

Both are common. Device for is followed by a noun or -ing form, while device to is followed by a verb.

Can I say on device?

Yes, especially in technology contexts, but it usually functions as a location phrase rather than a fixed combination.

What does device of mean?

It usually describes a type, period, or association, such as a device of modern engineering.

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