Under what circumstances, can not choose dynamic sensors?

The ultrasonic sensor is installed in the ceiling space height more than 3.5m; the use of ultrasonic sensor in the air flow in large space; equipped with furniture and equipment or hinder the use of passive infrared sensor clear sight area; the passive infrared sensor installed outdoors; in from air conditioning or radiator installed at the 1.5 2m the switch position sensor; the wall in the office door mounted sensor; sensor and control area or at the outlet of the emergency lighting; in the low occupant movement area installed passive infrared sensor.