KIDDE lasersense hssd2 aspirating detector aritech, high sensitivity by laser. 4 alarm levels. 5 relay outputs, combined sampling tubes up to 200 m in length (4), 100 m (1), perceptive ai classifire® system for adjustment according to ambient conditions and contamination, patented dual ldd 3d3 system to prevent false alarms caused by dust, rs485 communication for networks and remote communications.