An assembly for isolating and protecting the head and shaft of sprinklers from the surrounding soil, vegetation and external impacts, once it is installed into the ground. The device also determines, based on the CDMA capacityresource information, a resource availability associated with the CDMA RAN, and determines, based on the capacity and the resource availability associated with the CDMA RAN, a CDMA RAN resource allocation. The ESD protection circuit is also disposed in the peripheral area of the substrate, being electrically connected between the pixel units and the static releasing conductive line. The density separation device is coupled to an outlet of the tank.