warning device

The chemical plant installed a new warning device to alert workers of any gas leaks.

化工厂安装了一种新的预告讯号装置，用于提醒工人气体泄漏。

When the warning device detected a temperature rise, it automatically shut down the reactor.

当预告讯号装置检测到温度升高时，它自动关闭了反应器。

The laboratory's warning device sounded an alarm when the pressure exceeded safe levels.

实验室的预告讯号装置在压力超过安全水平时发出警报。