div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Network Scan Data · FSD Circular Letter No 22010 Multi-sensor Detectors in Fire Detection Systems This Circular Letter announces the criteria for local application of multi-sensor src=https:reader033fdocumentsinreader033viewer20220603215f0d20407e708231d438ce9fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Network Scan Data · FSD Circular Letter No 22010 Multi-sensor Detectors in Fire Detection Systems This Circular Letter announces the criteria for local application of multi-sensor src=https:reader033fdocumentsinreader033viewer20220603215f0d20407e708231d438ce9fhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv