Livonia Dermatology Plaza (Livonia) - This is the only place in Livonia that I know of with a Harrington system. It’s my first encounter with such a system in-person.
Panel/Annunciator:
Harrington Tracker-series panel, model unknown
Detectors:
Unknown
Pull stations:
Harrington HSPS-series pull stations
Notification appliances:
Wheelock Exceder horn/strobes and strobes
One SpectrAlert Advance horn/strobe, which I believe acts as a sprinkler alarm
McLaughlin’s Furniture (Novi)
Panel/Annunciator:
Panel unknown; annunciator is an Ademco brand, model unknown (circa 1980s-1990s)
Detectors:
System Sensor 2451-series thermal heat detectors
Pull stations:
NBG-10 pull stations
Notification appliances:
System Sensor MASS2475ADA horn/strobes and strobes, at least one of which was mounted on a hallway ceiling