STI (STI-14200NR) Universal Stopper Low Profile Cover, Spa

The STI STI-14200NR is a Universal Stopper Low Profile without horn — a clear polycarbonate protective cover for surface-mounted pull stations, keypads, intercoms, and similar wall devices. First, the installer mounts the red conduit spacer to the wall over the protected device. Then the polycarbonate low-profile cover snaps over the spacer on a high-strength continuous hinge. As a result, the device stays fully visible and operational while gaining UV-stabilized impact protection at a reduced wall projection.

What the STI STI-14200NR is built for

Manual pull stations, keypads, and emergency buttons in tight corridors and ADA-critical egress paths need protection without adding wall projection. However, full-depth Universal Stoppers add more depth than some installations allow. Therefore, the STI-14200NR Low Profile variant provides the same vandal-resistant polycarbonate protection at a reduced projection depth — useful where wall-mounted projections are tightly constrained.

Verified STI STI-14200NR specifications

• Family: STI Universal Stopper Low Profile — without horn (the “NR” suffix means No-horn, Red spacer)
• Cover type: Surface mount, low profile, ADA Compliant
• Material: Thick, super-tough, UV-stabilized polycarbonate
• Spacer: Red conduit spacer included; two conduit knockouts
• Mounting: Surface mount; high-strength continuous hinge
• Indoor / outdoor: Rated for indoor and outdoor installation
• Operating range: Polycarbonate working properties -40° to 250°F (-40° to 121°C)
• Compliance: ADA Compliant — low profile design
• Listing: UL Listed to U.S. and Canadian safety standards
• Protects: Pull stations, keypads, intercom stations, emergency buttons, electrical light switches, duplex plugs, and similar wall devices
• Warranty: Three-year guarantee against polycarbonate breakage in normal use

Where STI-14200NR fits in the Universal Stopper Low Profile family

The STI-142xx series is the surface-mount Low Profile Universal Stopper line. Specifically, the NR suffix means No-horn, Red spacer; the 144xx siblings (e.g. STI-14400NR) add an enclosed back box and sealed mounting plate. Furthermore, horn-equipped variants in the line add a piezo tamper alarm. As a result, the STI-14200NR is the surface-mount, no-horn variant with the red conduit spacer.

Low Profile vs. standard Universal Stopper

The standard Universal Stopper (132xx series) handles most installations. However, narrow corridors and tight ADA-compliant egress paths sometimes call for reduced wall projection. Specifically, the Low Profile cover reduces the cover’s projection while maintaining the polycarbonate impact protection. Furthermore, the red conduit spacer and integrated knockouts simplify conduit routing for surface-wired installations.

Application context

Schools, transit stations, hospitals, and public corridors are typical installations. In addition, the indoor/outdoor rating supports loading-dock and exterior egress installations. However, this is the no-horn variant — for tamper alarming, specify a horn-equipped Universal Stopper Low Profile variant.

Need help selecting the right part or verifying compatibility? Our team supports thousands of commercial fire alarm installations every year. Call us at 1-888-557-0558 or email sales@lifesafetycom.com for application guidance, lead-time updates, or volume pricing.