Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for monitoring a load condition over a specified area In one aspect, a load sensor comprises: a protective top cover having a load transfer assembly; a bottom plate attachable to the top cover; the bottom plate including a circuit board comprising; a load sensor, a power source; and a wireless processor; wherein the circuit board is configured on the bottom plate such that the load transfer assembly of the top plate is in contact with the load sensor.