The Protectowire Company, Inc.

Since 1938, we have manufactured the highest quality linear heat detectors for the special hazard industry. Learn more about our 80-year history in fire protection and how it all began. In early April of 1938, Gerald and Sarah Holmes tested, patented, and trademarked their fire detection system and the Protectowire Company Inc. was born. In the 1960s, with no heirs of their own, Gerald and Sarah gradually transferred ownership of the company to the Sullivan family. Andrew Sullivan, CEO and Chairman of the Board, currently oversees the company today. Protectowire FireSystems’ headquarters is located in Pembroke, Massachusetts just down the street from the barn where the original Protectowire Linear Heat Detector was invented. Eighty years later, Protectowire FireSystems continues to be the global leading manufacturer of Linear Heat Detection Systems.