Able to fit in the palm of your hand, the WV-16 Wide View Sensor unobtrusively mounts in a corner near the ceiling detecting small motions up to 40 feet away, and large motions up to 70 feet away. The unique Tilting feature allows this sensor to be mounted anywhere from 8 to 10 feet with excellent long-range coverage. In 30 by 30 ft. classrooms with no obstructions, this is all the sensor you will need. In corridors, the WV-16 is mounted flat against the wall and volumetrically views up to 70 feet. (For specific long narrow hallway applications, see HW-13 Technical Data Sheet). When corner or wall mounting is not possible, use ceiling bracket WV-BR accessory to locate the WV-16 on the ceiling where desired. By using multiple Wide Views in combination with the CM-9 PIR ceiling sensor, odd shaped rooms or corridors are also easily covered. For rooms with obstructions, the WV-PDT or CM-PDT-10 Dual Technology sensors should be used.