Shenzhen HTI Sanjiang Electronics (深圳市泛海三江电子股份) manufactures automatic fire alarm systems, electrical fire monitoring, gas-extinguishing control, combustible gas detection and emergency evacuation lighting. Its export range is listed in the LPCB Red Book under the 1426 and 1159 certificate families, covering EN 54-2 and EN 54-4 control and indicating equipment (1159h), EN 54-3 sounders and EN 54-23 visual alarm devices (1426a), EN 54-5 heat detectors (1426b), EN 54-11 manual call points (1426d) and EN 54-18 input/output devices (1426e). Quality management is certified to ISO 9001 by BSI. Founded in 1985, it is among the longest-established Chinese fire alarm manufacturers.