STI Horn/Strobe Damage Stoppers Series — Specifications

Specifications for the STI Horn/Strobe Damage Stoppers® series (STI-1210, STI-1215, STI-1217, STI-1219, STI-1221, STI-1225, STI-1227, STI-1229) — virtually indestructible protective covers for fire alarm horn/speaker and strobe units, designed to prevent accidental damage and vandalism.

Product Overview

These clear, thick, UV-stabilized polycarbonate covers protect horn, speaker, and strobe alarm devices from vandalism and accidental damage. Slotted versions (STI-1210, 1215, 1217, 1219) allow the horn to be heard through the cover; solid versions (STI-1221, 1225, 1227, 1229) are for strobe-only alarms. All covers carry a three-year guarantee against breakage of the polycarbonate in normal use.

Various back box and spacer depths are available to accommodate special applications, retrofits, surface-mount, and weather-resistant installations. Unique Enviro Kits are available for extreme conditions where dampness or standing water is present.

Key Features

• Helps prevent accidental and intentional damage or vandalism.
• Easy access for service.
• Covers are UV-stabilized; typical working temperature range of the polycarbonate is -40°F to 250°F (-40°C to 121°C).
• Enviro Kit available for harsh/damp conditions.
• STI-1229HTR heated Type 4X enclosure available for strobes used in freezing conditions.
• STI-1210 and STI-1221 series are ADA Compliant.

STI-1210 Series — Horn/Strobe Covers (Spacer Variants)

• STI-1210A — cover and enclosed back box, 4" deep, weather resistant
• STI-1210B — cover and enclosed back box with integral double-gang outlet box
• STI-1210C — cover and open back box, external mounting tabs
• STI-1210D — cover and open back box, conduit knockout
• STI-1210E — cover and open back box, flush mount

Overall dimensions: Height 8.5 in. (216mm), Width 6.5 in. (165mm). Depth varies by spacer: A = 6.25 in. (159mm), B = 3.5 in. (89mm), C = 4.75 in. (120mm), D = 5.75 in. (146mm), E = 4 in. (102mm).

STI-1221 Series — Strobe-Only Covers (Spacer Variants)

• STI-1221A — cover and enclosed back box, 4" deep, weatherproof, drain vent, Type 3R
• STI-1221A4X — cover and enclosed back box, 4" deep, weatherproof, Type 4X (includes silicone gasket)
• STI-1221A4X-WD — cover and enclosed back box, 4" deep, Type 4X, for wash-down areas
• STI-1221B — cover and solid enclosed back box with double-gang outlet box
• STI-1221C — cover and open back box, external mounting tabs
• STI-1221D — cover and open back box, conduit knockout
• STI-1221E — cover and open back box, flush mount

Overall dimensions match the STI-1210 series (Height 8.5 in./216mm, Width 6.5 in./165mm), with the same A–E depth options.

Stopper Dome — Horn/Speaker/Strobe (STI-1215/1217/1219)

• STI-1215 — flush mount
• STI-1217 — open back box
• STI-1219 — enclosed back box

Stopper Dome — Strobe Only (STI-1225/1227/1229)

• STI-1225 — flush mount
• STI-1227 — open back box
• STI-1229* — enclosed back box, Type 4X
• STI-1229-WD — enclosed back box, Type 4X, for wash-down areas

*Hazardous-location models also available — see STI-1229.

Accessories

• KIT-84 — Tamper resistant screws
• KIT-121 — Enviro Kit for D and E spacer models
• KIT-122 — Enviro Kit for B and C spacer models
• KIT-123 — Enviro Kit (includes three gaskets)
• KIT-06297D — "D" spacer only
• KIT-06297E — "E" spacer only
• KIT-19038 — Bit for tamper-resistant screws
• KIT-6297B20 — 3/4" conduit hub for "B" and "C" back box (outdoor rated)
• STI-1212 — Spacer kit
• STI-1222 — Enclosed back box
• STI-1283 — Backplate for "D" and "E" models
• STI-1284 — Single-gang mounting adapter for STI-1219 and STI-1229

Light & Sound Loss

Use of a horn/strobe cover on an audible device decreases sound output by approximately 6 dB(A) for typical horns (e.g. Amseco Audible Horn Sounders: 6.2 dBA loss) and less for speakers (e.g. Siemens Adapter Series at 0.5/1/2 watt taps: 4.1 dBA loss). Light loss percentage varies by manufacturer/model of the underlying strobe or horn/strobe unit — the manual includes a detailed compatibility chart listing light loss percentages (ranging roughly 20%–61%) for devices from ADT Security, EST/Edwards, Honeywell, Mircom, Siemens, Ziton, Amseco, Detection Systems, Gentex, Harrington Signal, National Time & Signal, Secutron, Faraday, System Sensor, Potter Electric, and Wheelock. Consult the full PDF for the exact figure matching your installed device.

Approvals & Certifications

• Tested and approved/listed by Underwriter Laboratories and Canadian UL File S7025.
• cUL approval for UL 1638 only.
• CSFM needs local approval.
• MEA approval applies to STI-1210 and STI-1221 series only.
• UL Listed for fire voice speakers, STI-1210 series only.
• ADA Compliant (STI-1210 and STI-1221 series; STI-1215/17/19 and STI-1225/27/29 domes also noted as ADA compliant where applicable).
• For hazardous applications in Canada (cUL), the underlying strobe must be ULC Listed.

Warranty

Three-year guarantee against breakage of the polycarbonate cover in normal use.

Manufacturer / Contact

Safety Technology International (STI), Inc.
2306 Airport Road, Waterford, MI 48327, USA
Tel: 248-673-9898  |  Toll-free: 800-888-4784  |  Fax: 248-673-1246
Email: info@sti-usa.com  |  Web: www.sti-usa.com

STI EMEA
Taylor House, 34 Sherwood Rd., Bromsgrove, Worcs., B60 3DR, England
Tel: +44 (0) 1527 520 999  |  Fax: +44 (0) 1527 501 999
Email: info@sti-emea.com  |  Web: www.sti-emea.com

© 1993–2022 Safety Technology International, Inc. Subject to change without notice.