Which organization is noted for testing fire protection devices?

The Underwriter's Laboratory (UL) is recognized for testing and certifying various fire protection devices to ensure they meet safety and performance standards. UL conducts rigorous testing protocols on products related to fire safety, including sprinkler systems, alarms, and other fire protection technologies. This extensive testing provides assurance to consumers and professionals in the industry that the products they use are reliable and effective in preventing and managing fire hazards. Consequently, UL's role is critical in promoting safety through its certifications, which are widely accepted across multiple sectors, including residential, commercial, and industrial settings.