STI STI-8130 Smoke Detector Damage Stopper with Conduit Spacer

Overview

The STI-8130 is a polycarbonate protective stopper designed to shield smoke detectors from physical impact during door frame assembly, lock, and strike installation work. The clear conduit spacer provides physical separation between the detector and surrounding hardware while maintaining visual access for detector status monitoring. This accessory is built for integrators and installers working in commercial and institutional environments where detector damage during installation is a common cost driver. The transparent construction means you can verify detector function without removing the stopper.

Compatibility

The STI-8130 works with existing smoke detector installations in standard door frame assemblies and is compatible with flush and surface mount applications where exposed conduit is present. The stopper is designed for use alongside lock and strike hardware configurations typical in access control installations. The 2.75-inch dimension accommodates standard detector positioning in frame-mounted scenarios. No modification to the detector or frame is required; the stopper mounts as a protective overlay.

Installation Notes

The polycarbonate construction resists impact from installation tools and hardware without affecting detector optical performance. Installation is straightforward—the stopper positions over the detector face and relies on the surrounding frame structure for retention. The slot geometry is designed to prevent pencil-sized objects (approximately 0.25 inches or smaller) from contacting the detector surface, a key durability measure in active installation environments. For unstable or uneven mounting surfaces, STI recommends use of the optional STI-8171 backplate to ensure secure seating and suitable protection. Clear construction eliminates the need to remove the stopper for routine detector testing or maintenance.