Monitor vs Sensor

When to use each in English, with meaning, register, and examples.

Monitor

Top 2,000 (common)B2noun

Sensor

Top 2,000 (common)
 MonitorSensor
Pronunciation🇬🇧 /["/ˈmɒnɪtə(r)/"]/🇺🇸 /["/ˈmɑːnɪtər/"]/🇬🇧 //ˈsɛn.sər//🇺🇸 //ˈsɛn.sɚ//
MeaningA screen used to see pictures or text from a computer.A device that detects changes or collects information.
ExampleThe teacher will monitor the students' progress throughout the semester.The smoke **sensor** alerted the fire department quickly.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2-
Part of speechnoun
Collocationscolour/​color, digital, CCTV, on a/​the monitor, baby, foetal/​fetal, heart, detect something, display something, show something, hooked up to a monitor, UN, ceasefire, election, UN, ceasefire, electiontemperature sensor, motion sensor, sensor technology, light sensor, sensor network
Antonymsignore, neglect-
Common mistakesConfused with 'minotor', a common misspelling., Using 'monitor' as a verb without an object, e.g., 'I will monitor' instead of 'I will monitor the situation.'Confused with 'sensors' as a singular form., Using 'sensor' incorrectly to mean 'sense' in non-technical contexts.
Usage notesUse 'monitor' when referring to computer screens or when talking about observing something continuously. More formal contexts may use it to describe supervision or tracking.Used in technical contexts or discussions about technology. Generally formal but can be used in everyday conversations about smart devices.

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Monitor

Frequently asked questions: Monitor vs Sensor

What's the difference between Monitor and Sensor?

Monitor: A screen used to see pictures or text from a computer. Sensor: A device that detects changes or collects information.

Can you show an example of each?

Monitor: The teacher will monitor the students' progress throughout the semester. Sensor: The smoke **sensor** alerted the fire department quickly.

Can I use Monitor and Sensor interchangeably?

Not always. Monitor and Sensor are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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