Floating-eye sensor

Floating-eye sensors are a security mechanism found in Chozodia during Metroid: Zero Mission. The sensors are eyes that ascend and descend walls while shining a harmless yellow beam that can detect intruders. They are a threat to Samus while she is sneaking through Chozodia to escape. She must avoid contact with the eye's beam by hiding in the shadows until the beam passes, or she will be detected. If she is detected, the sensors will begin to fire energy blasts at her.

The sensors are similar to Gadoras and the Eye mechanism in Super Metroid.