The OSI-RE-SS is really a reflector- form linear optical beam smoke detector designed to function for a component of hearth alarm programs. The beam operates totally on the principle of light obscuration utilising an Infra-Purple beam. Close/span> You can't entry this page as this solution will not be out there https://geniusbookmarks.com/story18544294/a-simple-key-for-conventional-beam-detectors-unveiled