Flexible sensor curtain

A system comprising:

• a flexible curtain that defines a major surface and is configured to repeatedly actuate to move between a deployed configuration and a stowed configuration;
• a first sensor configured to detect a first condition and removably attached to a first sensor attachment location;
• and
• a second sensor configured to detect a second condition and removably attached to a second sensor attachment location, wherein:
• the major surface extends across an operational surface of a target system such that the first and second sensors detect the first and second conditions of the target system when the flexible curtain defines the deployed configuration;
• the flexible curtain and the first and second sensors converge to a predetermined edge of the flexible curtain to expose the operational surface of the target system when the flexible curtain defines the stowed configuration,
• the target system comprises a server closet configured to hold one or more server racks inside the server closet;
• and
• the flexible curtain is configured to be attached to any selected side of the server closet, and to extend across most of the selected side of the server closet, and the flexible curtain is translucent.