System Sensor fire alarm devices and replacement parts
System Sensor is one of the most widely specified initiating and notification device lines in North American commercial fire alarm work, and it is the deepest catalog on this site. The range here covers L-Series horn strobes, strobes, horns and chimes in wall and ceiling versions, indoor and outdoor housings, red and white finishes, and both standard fire and ALERT-marked options. It also covers photoelectric and thermal spot detectors with their matching detector bases, duct smoke detector housings with sampling tubes and remote test stations, conventional and addressable relays and modules, and the back boxes, trim rings, retrofit plates, lenses and wire guards that finish an installation.
Most of these parts get chosen to match an existing system rather than picked in isolation. Start from the panel and the circuit: confirm whether the detection loop is conventional or addressable, whether the notification appliance circuit is two-wire or four-wire, and what the panel supplies to it. Then match the mounting condition, wall or ceiling and flush or surface, and the environment the device sits in, because indoor, outdoor and weatherproof versions are not interchangeable. Finish by matching the field-selectable settings, the color and the lettering the specification calls for.
Candela ratings, voltage ranges and listing information appear on each product page. If you are replacing a device on a system already in service, the model number printed on the installed unit is the fastest way to land on the right part.
FSG - Fire Services Group
