The technology of Detectors is improved. Not only sensing technology, but also installation technology.
The sensor part of Motion Detector is improved from single infrared sensor to double infrared sensor, microwave technology and infrared double technology, Ultrasonic wave technology etc.
The detector installation technology is improved for easier and fast installation as well. It used bracket separated design. And standard 86 type bottom box installation design is available for some hardwired detectors.
The improvement of detector installation design enables fast installation for project security such as building security, hotel security and residential security. The bracket can be installed in building at construction period. The detector can be installed after finishing. That will keep the detectors without damage from construction.
http://www.vedard.com China Alarm System expert.