1. A system for monitoring conditions under a raised floor in a data center, the system comprising: a grid of raised floor tiles having regular floor tiles interspersed with sensor floor tiles, wherein each of the sensor floor tiles comprises one or more sensors to monitor conditions under the raised floor, wherein the one or more sensors is attached to an underneath side of the each of the sensor floor tiles, one or more cameras to collect images of conditions under the raised floor, wherein the one or more cameras is attached to the underneath side of the each of the sensor floor tiles, and at least two cameras fixed to a camera post hanging from the each of the sensor floor tiles; a sensor comparator to locate a particular sensor floor tile, among the sensor floor tiles, with a sensor condition that is out-of-band from a reference condition band; and an image comparator to locate an image difference corresponding to the out-of-band sensor condition.