detector; detecting device; sensing device
Technical term for a device or unit that detects physical quantities, signals, or presence. Often used in engineering, electronics, and safety systems.
See also: 検出器 (けんしゅつき)
This detector sounds an alarm when it senses smoke.
The new sensing device can detect even minute vibrations.
検出器 is a more general term for a detector or sensor, while 検出装置 often implies a larger or more complex detecting apparatus or unit.
Compound of 検出 (detection) + 装置 (device, apparatus). A straightforward technical term.