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September 08, 2026 3 min read
Specification sheet for the STI Steel Web Stoppers series of UL Listed wire guards, protecting smoke detectors from vandalism and accidental damage.
Specification sheet for the STI Steel Web Stoppers® series — UL Listed wire guards that protect smoke detectors from vandalism and accidental damage.
STI borrowed from nature's master builder, the spider, to create a web of protection from vandalism and accidental damage with these UL Listed wire guards. They're constructed of 9-gauge steel wire with a corrosion-resistant polyester coating, or 9-gauge stainless steel wire, and together the series covers virtually every smoke detector model available today.
Three year guarantee against breakage in normal use. Highly recommended for areas where abuse to smoke detectors is severe. Installation is easy with anchors and screws provided. Models are available for both flush-mount and surface-mount detectors.
| STI-9601 | Steel Web Stopper, Low Profile — Flush Mount |
| STI-9601-SS | Steel Web Stopper, Low Profile — Flush Mount, Stainless Steel |
| STI-9602 | Steel Web Stopper, Low Profile — Surface Mount |
| STI-9604 | Steel Web Stopper for Mini Smoke Detectors — Flush Mount |
| STI-9604-SS | Steel Web Stopper for Mini Smoke Detectors — Flush Mount, Stainless Steel |
| STI-9605 | Steel Web Stopper for Mini Smoke Detectors — Surface Mount |
| STI-9605-SS | Steel Web Stopper for Mini Smoke Detectors — Surface Mount, Stainless Steel |
| STI-9609 | Steel Web Stopper, High Profile — Flush Mount |
| STI-9609-SS | Steel Web Stopper, High Profile — Flush Mount, Stainless Steel |
| STI-9610 | Steel Web Stopper, High Profile — Surface Mount |
| STI-9712 | Steel Web Stopper for Photoelectric Smoke Detector — Surface Mount (Not UL Tested) |
| STI-9713 | Steel Web Stopper for Photoelectric Smoke Detector — Flush Mount |
| KIT-82 | Tamper-resistant stainless steel screws, #8 x 1-1/2 in. snake eye (qty. 4) |
| KIT-19038 | Spanner bit for tamper-resistant screws with 5/16 in. hex drive |
| STI-8171 | Polycarbonate mounting backplate for flush and surface mount models; recommended for irregular/unstable mounting surfaces such as drop ceilings and beams. Used only with STI-9601, STI-9601-SS, STI-9602, STI-9609, STI-9609-SS, and STI-9610. |
STI-9601, STI-9602, STI-9604, STI-9605: UL Listed No. S3504 for use with Listed low profile smoke detectors; CSFM Approved.
STI-9609, STI-9610: UL Listed No. S3504 for use with Listed high profile smoke detectors; CSFM Approved.
STI-9713: UL Listed No. S3504 for use with a wide range of listed photoelectric smoke detectors from System Sensor, FCI, Secutron, EST, Intelligent Systems, Mircom, JCI, ADT, Fire-Lite, Gamewell, Honeywell, and Notifier — see reverse of manual for the complete detector model list.
Manufacturer: Safety Technology International, Inc., 2306 Airport Road, Waterford, MI 48327, USA · 248-673-9898 · 800-888-4784 · www.sti-usa.com
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