Von Duprin 99-ALK Alarm Kit fo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$952.00
$666.40
Von Duprin 99-ALK Alarm Kit, 36 in., 628 Anodized Aluminum finish, showing alarm bar, wiring harness, and key cylinder module disassembled

Von Duprin 99-ALK Alarm Kit for 98 & 99 Series Exit Devices with 85dB Horn and Key-Operated Arming

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Model: 99ALK 3FT US28
$952.00
$666.40
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$952.00
$666.40
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Von Duprin 99-ALK Alarm Kit for 99 Series Exit Devices with 85dB Horn and Key-Operated Arming

Commercial-Grade Exit Alarm Solution with Remote Arming Capability

The Von Duprin 99-ALK Alarm Kit is a professional-grade electronic security accessory engineered for use with Von Duprin 98 & 99 Series exit devices. When the touch bar is depressed, an internal horn emits an 85-decibel audible signal to instantly alert personnel to any unauthorized breach of the opening. Operating on a single standard 9-volt alkaline battery, the 99-ALK delivers long-lasting, reliable performance and includes a 24VDC input and External Inhibit as standard features for remote arming and disarming capability. The key switch is compatible with a standard 1-1/4" (32mm) mortise cylinder with a straight cam (Schlage 20-001, L583-477 cam), ensuring seamless integration with existing security setups.

Professional Features & Benefits

  • 85-Decibel Audible Alarm: Internal horn emits an 85dB signal when the touch bar is depressed, providing an immediate and powerful deterrent against unauthorized egress.
  • Key-Operated Arming and Disarming: Convenient key switch allows authorized personnel to arm or disarm the alarm quickly, maintaining full control over the exit device's security mode.
  • 24VDC Input and External Inhibit: Included as standard features, enabling remote arming and disarming for integration with access control and building security systems.
  • Cylinder Compatibility: Key switch is compatible with a standard 1-1/4" (32mm) mortise cylinder with a straight cam (Schlage 20-001, L583-477 cam) for seamless installation with existing hardware.
  • Battery-Powered Operation: Runs on a single standard 9-volt alkaline battery for reliable, self-contained performance independent of building power at the device level.
  • Low Battery Alert: When the battery weakens, the horn emits an intermittent low battery alert signal, prompting timely replacement and ensuring continuous protection.
  • Versatile Door Configuration Support: For 3' or 4' doors requiring cylinder dogging, the ALK can be relocated to the hinge side of the device, allowing standard cylinder dogging to be added. Note: standard dogging is removed when the ALK is used.
  • Included Security Decal: Comes with a complimentary 6" x 20" decal displaying "EMERGENCY EXIT ONLY. ALARM WILL SOUND." for visible deterrence. RSS push bar trim may be specified as an alternative.
  • Available Cover Styles: Offered in two styles—99ALK with a grooved cover and 98ALK with a smooth cover—to suit different aesthetic and application requirements.
  • Grade 1 Commercial Rating: Rated Grade 1 for demanding commercial applications requiring dependable, high-cycle performance.

Technical Specifications

  • Product Group: Electronic Access Controls
  • Series: 98 & 99 Series
  • Grade: Grade 1
  • Product Subgroup: Exit Control Locks and Alarms
  • Subcategory: Exit Control Locks and Alarms
  • Product Type: Alarm Kit
  • Commercial/Residential: Commercial
  • Fire Rating: No
  • Switch Device: Request to exit (RX)
  • Product Category: Electronic Access Controls
  • Department: Door Hardware

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments and Loss Prevention
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Von Duprin Quality?

Von Duprin alarm kit products deliver professional-grade reliability with Grade 1 commercial-rated construction designed for demanding exit control applications. The 99-ALK features an 85-decibel internal horn, 24VDC remote arming capability, and battery-powered operation with a built-in low battery alert, ensuring continuous and dependable security performance. Engineered for seamless integration with the 98 & 99 Series exit device platform, the Von Duprin 99-ALK is a trusted solution for commercial facilities where reliable egress control and audible deterrence are essential.

Manufacturer Resources

Von Duprin 98/99 Series Catalog

Product Specs

Product Group:
Electronic Access Controls
Series:
98 & 99 Series
Grade:
Grade 1
Product Subgroup:
Exit Control Locks and Alarms
Subcategory:
Exit Control Locks and Alarms
Product Type:
Alarm Kit
Commercial/Residential:
Commercial
Fire Rating:
No
Switch Device:
Request to exit (RX)
Product Category:
Electronic Access Controls
Department:
Door Hardware

Von Duprin 99ALK 3FT US28 – Frequently Asked Questions

1) Will the Von Duprin 99-ALK alarm kit work on my exit device, or is it only for 98 and 99 Series?
The 99-ALK is built for Von Duprin 98 and 99 Series exit devices and nothing else. It mounts to the device itself and the horn triggers off the touch bar, so it has to match that chassis. The kit comes in two cover styles to match the device you already have: 99ALK with a grooved cover for a 99 Series device, 98ALK with a smooth cover for a 98. Match the cover to the device or the alarm will look wrong on the door even though it functions.
2) Does the 99-ALK exit alarm come with a cylinder for the key switch, and what cylinder do I order?
No cylinder is supplied with the kit, so order one separately. The key switch takes a standard 1-1/4 inch (32mm) mortise cylinder with a straight cam, specifically the Schlage 20-001 with the L583-477 cam. If you key your building to a single system, this is the point where the alarm joins it: the switch arms and disarms with that key, so use the same keyway as the rest of the openings.
3) If I add the 99-ALK alarm kit, can I still dog the exit device down during business hours?
Standard dogging is removed when the ALK goes on the device. That matters on a retail or school opening you dog open every morning. There is a way around it: on 3 foot or 4 foot doors the ALK can be relocated to the hinge side of the device, which frees the space to add standard cylinder dogging. Specify cylinder dogging with the device if you need the push bar held down; you cannot add the mechanical dogging back later without that relocation.
4) Can I arm and disarm the 99-ALK exit alarm from the front desk instead of walking to the door with a key?
Yes. A 24VDC input and External Inhibit come standard on the kit, so the alarm can be armed and disarmed remotely from an access control panel or a security desk. The kit also reports request-to-exit, so the head end knows the bar was pushed rather than just hearing the horn. The key switch stays as the local override for staff at the opening.
5) Does the 99-ALK alarm kit need to be wired to building power to sound?
No. The horn runs off a single standard 9 volt alkaline battery at the device, so it sounds whether or not the building has power or the door is wired at all. That makes it workable on a stockroom or a rear egress door with no conduit run to it. When the battery gets weak the horn pulses an intermittent low battery signal so maintenance knows to swap it. The 24VDC input is only there if you want remote arming, not to run the horn.
6) Can I put a 99-ALK alarm kit on a fire rated exit door?
The 99-ALK carries no fire rating. On a labeled fire door assembly, keep to hardware that is listed for that opening. The kit is a Grade 1 commercial alarm for controlling and announcing unauthorized egress on non fire rated openings, which is the usual application: emergency exit only doors, stockroom rear exits, and loss prevention doors.
7) How loud is the Von Duprin 99-ALK horn, and does it sound at the door or at a panel?
85 decibels, from an internal horn in the alarm housing on the device itself. It sounds locally at the opening the moment the touch bar is depressed, which is what stops a casual push and turns heads in a retail floor or a warehouse. If you also need the event at a monitoring point, that is what the request-to-exit output is for.
8) Is an exit device alarm kit the right choice, or should I use a standalone exit alarm on the door?
An exit alarm kit like the 99-ALK integrates into the 98 or 99 Series device you are already installing, so there is one piece of hardware on the door instead of two, and the horn triggers directly off the touch bar rather than off a separate door contact. Go this route when the opening is getting a Von Duprin 98 or 99 device anyway and you want a local 85dB alert plus request-to-exit reporting. A separate surface mounted alarm makes more sense when the exit device is another brand or another series, since the ALK will not mount to it.
9) What signage comes with the 99-ALK, and do I have to buy the door decal separately?
A 6 x 20 inch decal reading EMERGENCY EXIT ONLY. ALARM WILL SOUND. is included with the kit, so you do not need to source signage for the door. If you would rather have the warning on the push bar than on the door face, RSS push bar trim can be specified instead.
10) What finish and size does the Von Duprin 99-ALK alarm kit ship in?
628 anodized aluminum, sized for a 36 inch door. That is the standard clear aluminum finish and it sits alongside 628 exit devices and aluminum storefront without standing out. If you are standardizing a building where the existing devices are already 628, the alarm cover will match.
How fast can I get the Von Duprin 99ALK 3FT US28 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 Von Duprin 99ALK 3FT US28 come with a warranty?
Absolutely. The Von Duprin 99ALK 3FT US28 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 Von Duprin 99ALK 3FT US28?
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
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