Polycarbonate protection for smoke detectors where abuse is severe, whether accidental or malicious. The Polycarbonate Detector Stopper is easy to install in areas where severe vandalism or physical abuse is causing false fire alarms or high maintenance costs to your smoke detectors. An alternative to the Steel Web Stoppers, this polycarbonate version can be used in prisons as well as hospitals as the slots are narrow. The Polycarbonate Detector Stopper is available for flush or surface mounted applications with exposed conduit. To view other polycarbonate covers and enclosures, please click here.