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Sensor

UK //ˈsɛn.sər// US //ˈsɛn.sɚ// Pronunciation

Definition

A device that detects and measures physical properties.

Listen to definition

In simple words: A device that detects changes or collects information.

Examples

• The smoke **sensor** alerted the fire department quickly.
• Wearable fitness devices often include a heart rate **sensor**.
• The motion **sensor** turned on the lights automatically.
• Researchers are developing new types of **sensors** for environmental monitoring.
• A temperature **sensor** can help regulate the heating system.

Usage notes

Used in technical contexts or discussions about technology. Generally formal but can be used in everyday conversations about smart devices.

Grammar pattern

noun

Memory hint

Think of a 'sense' with an 'or' at the end. A sensor senses things.

Collocations

• temperature sensor
• motion sensor
• sensor technology
• light sensor
• sensor network

Synonyms

• detector
• monitor
• measurer
• transducer
• gauge

Common mistakes

• Confused with 'sensors' as a singular form.
• Using 'sensor' incorrectly to mean 'sense' in non-technical contexts.