detector

detector — 名詞

1. An object built to locate or reveal something that would otherwise remain hidden

1.名詞B1
釋義

偵測器

用於發現或測量特定物質的裝置

An object built to locate or reveal something that would otherwise remain hidden — including smoke, metal, movement, or dishonest answers

例句

The smoke detector went off when the toast burned in the kitchen.

吐司在廚房烤焦時，煙霧偵測器響了起來。

collocation: smoke detector

Airport security asked Esteban to empty his pockets before walking through the metal detector.

機場安檢人員請 Esteban 清空口袋後再走過金屬探測器。

collocation: metal detector

同義詞
  • sensor

    A sensor detects physical input (heat, light, pressure) but does not always signal an alarm or identify a specific substance.

  • alarm

    Alarm focuses on the warning function; a detector may or may not include an audible alert.

  • scanner

    A scanner actively sweeps an area; a detector can be stationary and passive.

用法筆記

Commonly combined with the name of the substance being detected, as in smoke detector, metal detector, or lie detector.

常見錯誤

❌The fire detector saved our house.
✅The smoke detector saved our house.
💡Most home safety devices detect smoke particles, not fire directly.
❌A detector can detection small signals.
✅A detector can detect small signals.
💡Use the verb 'detect' after a modal, not the noun 'detection'.

2. A specialized electronic device that picks up radio waves, electromagnetic field

2.名詞B2
釋義

探測器

偵測無線電波或放射線的電子設備

A specialized electronic device that picks up radio waves, electromagnetic fields, or radioactive particles, typically used in scientific or technical work

例句

The lab technician used a radiation detector to check for leaks near the storage room.

實驗室技術員用輻射探測器檢查儲藏室附近是否有洩漏。

collocation: radiation detector

Luca pointed the wave detector at the wall and picked up a hidden listening device.

Luca 將電波探測器對著牆壁，偵測到一個隱藏的竊聽裝置。

同義詞
  • receiver

    A receiver specifically processes incoming signals for output; a detector only registers their presence.

  • probe

    A probe is inserted into an environment for sampling; a detector can operate at a distance.

  • Geiger counter

    A Geiger counter is a specific type of radiation detector used in labs and field work.

用法筆記

In scientific contexts this sense overlaps with sensor, but detector usually implies identifying a specific substance or energy type, whereas sensor measures a physical quantity.

常見錯誤

❌The radio detector can hearing signals from far away.
✅The radio detector can pick up signals from far away.
💡Use 'pick up' or 'detect', not 'hearing'.