1、n，传感器；（探测光、热、压力等的）敏感元件；探测设备。

2、例句：

A sensor channels the light signal along an optical fibre. 传感器沿光导纤维输送光信号。

The temperature sensor is making the computer think the engine is cold when, in fact, its hot. 温度传感器发给计算机的信息为发动机是冷却的，可实际上它的温度很高。