9 Safety sensors, namely, spark and glowing particles detection apparatus and alarm monitoring systems for the prevention of fire and explosion; pressure measuring apparatus, gas detectors for detecting the presence of gas, monitoring and controlling devices, namely, access control and alarm monitoring systems; smoke detectors; fire detectors; leak detectors for vacuum pumps; ignition spark fire detectors; gas detecting apparatus, namely, gas appliance alarm timer for detecting and alerting the presence of gas flow after a prescribed period of time; interfaces for detectors; infrared detectors; fire sensors; sensor power controllers; optical sensors; optical inspection apparatus; optical inspection apparatus for industrial use; alarm installations and warning bells; smoke alarms; fire alarms; fire control apparatus, namely, fire extinguishers; spark-guards, namely, surge protectors; fire protection apparatus, namely, sprinkler systems; fire extinguishing apparatus; automatic sprinkler apparatus, namely, valves being parts of fire sprinklers for fire extinguishing; electric control panels; electric fire pump control valves; electronic controllers for use with power converters; electric control devices for energy management; electronic control systems for machines; electronic access control systems for interlocking doors; pressure measuring apparatus; pressure indicators; downloadable fire detection software; downloadable software for monitoring, analysis, checking and controlling measures to mitigate, prevent and manage fire and explosion; apparatus, instruments and devices, namely, spark and glowing particles detection apparatus for the prevention of fire and explosion for use in fire risk protection that can insulate an explosion; apparatus, instruments and devices, namely, spark and glowing particles detection apparatus that can prevent the spread of an explosion; apparatus, instruments and devices, namely, spark and glowing particles detection apparatus enabling the prevention of the spreading of flames; rupture discs that open under pressure or under specific pressure conditions, namely, rupture disks that burst at a predetermined pressure to protect vessels, equipment or systems from overpressurization being parts of fire protection systems and fire and explosion protection equipment; flanges being structural parts of fire protection sprinkler systems and fire and explosion protection equipment, namely, fire pump control valves; unloading check valves for the outlets of air compressors and vacuum valves being structural parts of fire protection sprinkler systems and fire and explosion protection equipment, namely, fire pump control valves; disc seals as structural parts of fire protection sprinkler systems and fire and explosion protection equipment, namely, fire pump control valves; rupture disc indicators, namely, pressure indicators for use with rupture discs, flanges, check vales, vacuum valves and disc seals; explosion pressure relief vents as structural parts of fire protection sprinkler systems