Von Duprin 98-ALK Exit Alarm Kit for 98 & 99 Series Exit Devices with 85dB Horn and Key ControlCommercial-Grade Exit Alarm Solution with Audible Alert and Remote Arming CapabilityThe 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 & Benefits85-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 SpecificationsProduct Group: Electronic Access ControlsSeries: 98 & 99 SeriesGrade: Grade 1Product Subgroup: Exit Control Locks and AlarmsSubcategory: Exit Control Locks and AlarmsProduct Type: Alarm KitCommercial/Residential: CommercialFire Rating: NoSwitch Device: Request to exit (RX)Product Category: Electronic Access ControlsDepartment: Door HardwareProfessional ApplicationsCommercial Office BuildingsEducational FacilitiesHealthcare InstitutionsRetail Establishments and Loss PreventionIndustrial and Warehouse FacilitiesMulti-Tenant Residential PropertiesGovernment and Municipal BuildingsWhy 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.