primary detecting element

例句：

1. 1. The new device is designed to detect the presence of a specific chemical in the environment.
   这款新设备旨在检测环境中特定化学物质的存在。
2. 2. The primary sensor in this system can detect changes in temperature and humidity levels.
   该系统中的初级传感器可以检测温度和湿度水平的变化。
3. 3. In order to improve accuracy, the manufacturer has upgraded the primary detector to use more advanced technology.
   为了提高准确性，制造商已经升级了初级探测器，使用了更先进的技术。