STI Exit Stopper® Series: Mult...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$120.89
STI Exit Stopper multifunction door alarm - interior PCB and battery compartment, rear cover removed

STI Exit Stopper® Series: Multifunction Door Alarm

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Model: STI-6400
$120.89

In Stock (leaves warehouse same day if ordered before 3pm ET)

$120.89
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STI Exit Stopper Series Multifunction Door Alarm

The STI Exit Stopper Series mounts on emergency exit and rear doors to alert staff to unauthorized exits or entries. When the door is opened without authorization, the unit sounds a 95 dB or 105 dB horn and flashes a visual alert to deter theft and protect inventory, assets, and property. Operation runs on a 9 VDC battery (included) or 12-24 VDC input.

Key Features

  • Alerts to unauthorized exits or entries through emergency exit or rear doors.
  • Loud 95 dB or 105 dB alarm with flashing visual alert.
  • Programmable as alarm or annunciator mode.
  • Arming delay allows time for authorized exits before the alarm activates.
  • Trip delay option for immediate or delayed alarm triggering.
  • User-selectable alarm duration: 30 seconds, 3 minutes, or continuous.
  • Low battery warning beep and flash; extended battery life mode.
  • Key-operated override for authorized access; always-active version also available.
  • Clear UV-stabilized polycarbonate housing with 3-year guarantee against breakage.
  • Available for single doors, double doors, and remote horn installations.
  • CE Approved.

Power

9 VDC battery (included) or 12-24 VDC input.

Warranty

3-year warranty on polycarbonate housing; 1-year warranty on electronic components.

Manufacturer Resources

VIEW SPEC SHEET

Product Specs

Accessories:
Remote horn kit, tamper wrench, labels, replacement keys and siren
Alarm Duration:
30 seconds, 3 minutes, or continuous
Alarm Volume:
95 dB or 105 dB
Certifications:
CE Approved
Modes:
Alarm or Annunciator
Parent SKU:
STI-EXIT-STOPPER-SERIES
Power Source:
9 VDC Battery (included), 12-24 VDC input
Product Line:
STI Exit Stopper® Series
Warranty:
3-Year Polycarbonate; 1-Year Electronic Components
Application:
Emergency exit doors, rear doors, inventory protection
Product Group:
Safety
Product Subgroup:
Stopper Devices
Product Type:
Exit Stopper® Series – Multifunction Door Alarm
Department:
Safety
Installation Options:
Single Door, Double Door, Remote Horn
Product Material:
Clear UV-Stabilized Polycarbonate

Parts & Accessories

    Safety Technology International STI-6400 – Frequently Asked Questions

    1) Will the STI Exit Stopper work on a pair of double doors, or do I need one on each leaf?
    There's a dedicated double door configuration of the Exit Stopper, so you don't hang two single-door units on a pair. Ordering runs on three choices: Door Type (Single Door or Double Door), Horn Type (Standard or Remote Horn), and Mode (Standard key-override or Always Active). Pick Double Door when the alarm has to cover both leaves of an emergency exit pair.
    2) What is the difference between the Standard and Always Active versions of the STI Exit Stopper door alarm?
    The Standard version has a key-operated override, so authorized staff can turn the alarm off at the door and pass through without setting it off. The Always Active version stays armed with no override at the unit, which is what you want on a rear or stockroom door where nobody should be disarming it locally. Both are offered on single and double door units, with or without a remote horn.
    3) How do I stop the Exit Stopper alarm from going off every time staff legitimately use the door?
    Two timing settings handle that. The arming delay gives a window after the unit is set before it goes live, so an authorized person can get through. The trip delay decides whether the horn fires the instant the door opens or after a pause, which lets someone reclose the door before it sounds. On the Standard mode unit you also get a key override to disarm it at the door outright.
    4) Does the Exit Stopper run on batteries or does it need to be wired in?
    Either. A 9 VDC battery is included, so it will run standalone with no wiring at all, and there's a 12-24 VDC input if you'd rather power it from a building supply. That battery option is why it goes onto leased space and older doors where running power to the opening isn't practical. It beeps and flashes on low battery, and there's an extended battery life mode if you're maintaining a lot of doors.
    5) Will the Exit Stopper mount on a metal fire exit door with a panic bar already on it?
    The Exit Stopper mounts on the door surface rather than replacing anything in it, so it goes over nearly any door and does not interfere with an existing exit device. That is the point of it: you keep the panic hardware and the free egress it provides, and add an audible alert when the door is used. It's a surface-mounted alarm, not a locking device, so it doesn't change how the door opens.
    6) How loud is the STI Exit Stopper door alarm, and how long does it sound?
    The horn is selectable at 95 dB or 105 dB, with a flashing visual alert alongside it. Duration is user-set to 30 seconds, 3 minutes, or continuous until reset. For a retail back door where you want the person to know they've been caught but not clear the sales floor, 95 dB on the 30 second setting is the usual pick; continuous at 105 dB is for a door nobody should ever be opening.
    7) Does the Exit Stopper have to be an alarm, or can it just chime when the door opens?
    It can be programmed either way. In alarm mode it sounds the full horn to deter unauthorized use; in annunciator mode it announces the door opening instead, which suits a receiving door or a back entrance where you want staff notified rather than the building startled. The mode is programmed at the unit, so the same part covers both jobs.
    8) Should I use an Exit Stopper alarm or a full alarmed panic bar on my rear exit door?
    An alarmed horizontal exit device replaces the door's hardware and is a much bigger job and cost. The Exit Stopper is a surface-mounted alarm that fits over the door you already have, keeps your existing exit hardware, and runs on an included 9 VDC battery, so there is no hardware swap and no power to pull. Go with the exit device when code or the spec requires panic hardware on that opening. Go with the Exit Stopper when the door already has compliant hardware and what you actually need is to know when someone uses it.
    9) Can the STI Exit Stopper be tied into a wireless alarm system?
    A wireless conversion board (STI-34071) is offered for the Exit Stopper, which is the route for reporting door activity back to a system rather than only sounding at the opening. The unit also accepts 12-24 VDC input if you're integrating it into powered infrastructure instead of leaving it on battery.
    10) Does the STI Exit Stopper carry any approvals?
    The Exit Stopper Series is CE Approved. That's the marking stated for the series; it's a self-contained door alarm rather than a life safety initiating device, so specify it as a security and loss-prevention alarm on the door, not as part of a fire system.
    How fast can I get the Safety Technology International STI-6400 delivered?
    Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
    Can I return it if it doesn’t work for me?
    Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
    Does the Safety Technology International STI-6400 come with a warranty?
    Absolutely. The Safety Technology International STI-6400 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
    How do I get technical support or installation help for the Safety Technology International STI-6400?
    You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
    Why buy the Safety Technology International STI-6400 from ZenSupply?
    ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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