There is a third wire called the sense wire.

还有第三根导线，即读出线。

youdao

The 66309d offers a new Agilent-developed feature that enables cellular-telephone manufacturers to detect permanently and intermittently open-sense wire connections automatically.

66309d提供了安捷伦研制的一种新功能，使得蜂窝电话制造商能够自动检测开路和间歇开路传感线连接。

youdao

He can sense when a moth is blowing a raspberry by attaching a wire to the muscle that controls the insect's tongue, and using it to transmit a signal via one of Dr Hildebrand's tiny electronic backpacks.

ECONOMIST: Robomoths