Von Duprin 98-ALK Exit Alarm K...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$762.83
$663.88
Von Duprin 98-ALK Exit Alarm Kit for 98 & 99 Series Exit Devices with 85dB Horn and Key Control

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

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Model: 98 ALK 3FT 628
$762.83
$663.88
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$762.83
$663.88
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Von Duprin 98-ALK Exit Alarm Kit for 98 & 99 Series Exit Devices with 85dB Horn and Key Control

Commercial-Grade Exit Alarm Solution with Audible Alert and Remote Arming Capability

The Von Duprin 98-ALK Exit Alarm Kit is a Grade 1 commercial-grade alarm accessory engineered for seamless integration with Von Duprin 98 and 99 Series exit devices. Featuring an internal horn that emits an 85-decibel audible signal when the touch bar is depressed, this alarm kit delivers immediate breach notification to deter unauthorized access. The 98-ALK features a smooth cover design, while the 99ALK variant offers a grooved cover, and both include a 24VDC input and External Inhibit as standard for remote arming and disarming. 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 straightforward integration with existing security infrastructure.

Professional Features & Benefits

  • 85-Decibel Audible Alarm: Internal horn emits an 85dB alert signal the moment the touch bar is depressed, providing immediate notification of any unauthorized opening attempt.
  • 24VDC Input and External Inhibit: Standard 24VDC input with External Inhibit allows for remote arming and disarming, enabling integration with access control and building management systems.
  • Key-Operated Arming and Disarming: Convenient key switch provides direct, on-device control over the alarm's security mode for authorized personnel.
  • Mortise Cylinder Compatibility: Key switch accepts a standard 1-1/4" (32mm) mortise cylinder with a straight cam, compatible with Schlage 20-001 and L583-477 cam configurations for seamless integration.
  • Battery-Powered Operation: Operates 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 battery charge weakens, the horn emits an intermittent low battery alert signal, prompting timely replacement before security is compromised.
  • Flexible Door Configuration Support: Accommodates 3' and 4' door widths; the ALK unit can be relocated to the hinge side of the device to allow standard cylinder dogging when required. Note: standard dogging is removed when the ALK is installed.
  • Visual Deterrent Included: Kit includes a complimentary 6" x 20" door decal reading "EMERGENCY EXIT ONLY. ALARM WILL SOUND." for immediate visual deterrence; RSS push bar trim may be specified as an alternative.
  • Grade 1 Commercial Rating: Rated Grade 1 for demanding commercial applications requiring the highest level of durability and reliability.

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 exit alarm products deliver professional-grade reliability backed by a Grade 1 commercial rating, ensuring the highest standard of performance in demanding access control environments. The 98-ALK Exit Alarm Kit combines a powerful 85-decibel internal horn, 24VDC remote arming capability, and key-operated control in a robust assembly designed for long-term dependability. Engineered for commercial applications where consistent, verifiable security performance is essential, Von Duprin quality provides the confidence needed to protect high-traffic openings effectively.

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 98 ALK 3FT 628 – Frequently Asked Questions

1) Will the Von Duprin 98-ALK alarm kit work on my 99 Series exit device, or only on a 98?
The ALK kit fits both the 98 and 99 Series devices. The difference is cosmetic: the 98-ALK carries a smooth cover to match the 98 touchpad, and the 99ALK version has a grooved cover to match the 99. Order the cover that matches the device already on the door so the alarm housing does not read as an add-on.
2) Does adding the Von Duprin exit alarm kit take away dogging on the exit device?
It does. Installing the ALK removes standard dogging on the device. There is a way around it: the ALK unit can be relocated to the hinge side of the exit device, which frees up standard cylinder dogging. If you hold that opening open during business hours, plan the ALK on the hinge side from the start, because moving it later means re-prepping the device.
3) What cylinder do I need for the key switch on a Von Duprin 98-ALK exit alarm?
The key switch takes a standard 1-1/4 inch (32mm) mortise cylinder with a straight cam, specifically a Schlage 20-001 with the L583-477 cam. The kit can be ordered either with that cylinder included (the 20-001 XQ11-949 option) or with no cylinder, which is the choice if you are keying the building into your own keyway and supplying the cylinder yourself.
4) Can I use a Von Duprin 98-ALK exit alarm on a fire rated door?
No. The 98-ALK exit alarm kit is not fire rated. For a labeled fire door opening you need hardware that carries the rating, so keep this kit on non-rated openings such as stockroom, delivery, and emergency egress doors where the concern is unauthorized use rather than a fire label.
5) What size Von Duprin ALK alarm kit do I order for a 36 inch door versus a 48 inch door?
The kit comes in a 36 inch and a 48 inch size, matched to 3 foot and 4 foot door widths. Measure the door leaf, not the frame opening: a nominal 3 foot leaf takes the 36 inch kit, a 4 foot leaf the 48 inch. Both sizes are offered in every finish the kit is made in.
6) Can I arm and disarm a Von Duprin exit alarm remotely from an access control panel?
Yes. A 24VDC input with External Inhibit is standard on the kit, so a panel or building management system can inhibit the alarm remotely, for example to let deliveries through a rear door on a schedule without anyone walking down to key the switch. The kit also carries a request to exit switch, so the same opening can report a legitimate egress back to the panel. Local key control at the device remains available regardless.
7) Does the Von Duprin ALK exit alarm need to be wired for power, or does it run on a battery?
It runs on a single standard 9 volt alkaline battery, so the alarm itself works with no building power at the door. When the battery weakens the horn sounds an intermittent low battery signal so it gets replaced before the opening is left unmonitored. Wiring is only needed if you want the 24VDC remote inhibit function; the audible alarm does not depend on it.
8) How loud is the Von Duprin 98-ALK alarm and what sets it off?
The internal horn puts out 85 decibels and sounds the moment the touch bar is depressed. That is loud enough to carry down a corridor and turn heads in a retail floor or warehouse, which is the point: it is a deterrent alarm on the door, not a silent notification. For staff areas where noise matters, weigh that against a monitored-only setup.
9) Is the Von Duprin exit alarm kit heavy duty enough for a school or hospital exit door?
It is Grade 1, the commercial duty level, and it is built for commercial rather than residential openings. That is the tier specified for high traffic institutional doors, and the kit is used on school, healthcare, office, retail loss prevention, warehouse, multi-tenant residential, and government openings. The one limit to watch is that it is not for fire rated doors.
10) Is signage included with the Von Duprin exit alarm kit, or do I order that separately?
A 6 x 20 inch door decal reading EMERGENCY EXIT ONLY. ALARM WILL SOUND. comes in the kit at no added charge, so you are not sourcing signage separately for each opening. If you would rather have the warning on the push bar itself instead of on the door face, RSS push bar trim can be specified as the alternative.
11) What finishes does the Von Duprin 98-ALK exit alarm kit come in to match the rest of my door hardware?
Ten finishes: 605 bright brass, 606 satin brass, 612 satin bronze, 619 satin nickel, 625 bright chrome, 626 satin chrome, 628 anodized aluminum, 630 satin stainless steel, 710 dark bronze, and 711 flat black. If you are standardizing a building, 626 satin chrome and 630 satin stainless are the two that most commonly sit alongside existing Von Duprin devices, and every finish is available in both the 36 and 48 inch size.
How fast can I get the Von Duprin 98 ALK 3FT 628 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 98 ALK 3FT 628 come with a warranty?
Absolutely. The Von Duprin 98 ALK 3FT 628 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 98 ALK 3FT 628?
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 Von Duprin 98 ALK 3FT 628 from ZenSupply?
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