sensor
A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
A sensor is purely input-focused; it gathers data from the physical environment (like heat, light, or motion) and converts it into an electrical signal, but does not perform physical actions itself.
Word relationships
- detector: Detector is a broad term for anything that reveals the presence of something, while a sensor specifically refers to a technical device that measures and transmits precise environmental data.
- scanner: A scanner actively reads or images a surface or document, whereas a sensor typically sits passively and waits to detect environmental changes.
- actuator: An actuator is the physical 'doer' that executes a command, whereas a sensor is the 'observer' that gathers environmental data.
Commonly confused with
- transducer: A transducer converts energy from one form to another, while a sensor specifically converts a physical parameter into an electrical signal for measurement.
Word family
- sensory (adjective): Relating to sensation or the physical senses.
- sensorial (adjective): Of or relating to the senses or the sensorium.
Collocations
- motion sensor
- temperature sensor
- proximity sensor
- sensor array
Example sentences
- "The motion sensor detected the intruder stepping onto the porch and immediately turned on the floodlights." Home security installation
- "Modern cars are equipped with a proximity sensor in the bumper to help drivers avoid hitting obstacles while parking." Automotive safety features
Memory hook
A 'sensor' acts like a human 'sense' organ, feeling the environment and reporting back to the brain. Sensors sense the surroundings.
When not to use
Do not confuse with an 'actuator', which is the component that performs a physical action (like opening a valve or turning a lock) based on the sensor's data.
Fun facts
- The human skin is the largest biological sensor in existence, packed with millions of nerve endings that detect temperature, pressure, and pain.
Related words
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