[N-COUNT 可数名词]探测器；检测仪 A detector is an instrument which is used to discover that something is present somewhere, or to measure how much of something there is.
[oft n N]
...a metal detector.
金属探测器
...fire alarms and smoke detectors.
火警报警器和烟雾检测器
Oxford
de·tect·orAWL/dɪˈtektə(r); NAmEdɪˈtektər/nouna piece of equipment for discovering the presence of sth, such as metal, smoke, explosivesor changes in pressure or temperature 探测器；侦察器；检测器◆a smoke detector烟雾检测器detectordetectorsde·tect·or/dɪˈtektə(r); NAmEdɪˈtektər/