Detex EAX-2500S / EAX-2500SK — 100 dB Surface-Mount Exit Alarms | Black, Gray, Cylinder, IC7 & Complete Kit Options

Protect restricted and emergency exit doors against unauthorized use with the Detex EAX-2500S, a commercial-duty, surface-mounted, externally powered AC/DC exit alarm. The alarm monitors a compatible magnetic door contact and sounds an approximately 100 dB piezo horn when an armed exit opens. Choose from Black or Gray Standard, Gray KS Key Stop, Gray W-CYL KA with keyed-alike cylinder, Black or Gray MC65 with factory-installed conventional cylinder, Black or Gray SK Complete Kits, Gray SK W-CYL KA Complete Kit with keyed-alike mortise cylinder, or Black or Gray SK IC7 Complete Kits with factory-installed 7-pin interchangeable-core housing, plus the Gray SK KS Complete Kit with factory-installed Key Stop. All six SK configurations include a surface magnetic door contact and a 24VAC transformer.

The compact housing mounts at a compatible 4-inch × 4-inch electrical box, making it suitable for commercial and institutional facilities that require audible exit monitoring without locking, delaying, or otherwise restricting emergency egress.

Choose Your Configuration — 12 Options

Important — S versus SK: The six standard EAX-2500S variants are alarm-only configurations that require a separately purchased compatible magnetic door contact and external power transformer. EAX-2500SK Black, Gray, Gray W-CYL KA, IC7 Black, IC7 Gray, and KS Gray are complete surface-mount installation kits with a surface magnetic door contact and 24VAC transformer included alongside the alarm, surface back box and EA-561 sign. Standard Black and Gray SK kits, and SK KS Gray, do not include an operating mortise cylinder. The SK Gray W-CYL KA includes a factory-supplied keyed-alike conventional mortise cylinder. The SK IC7 Black and Gray variants each include a factory-installed 7-pin interchangeable-core housing, but no removable core or keys. Gray S KS and Gray SK KS each add a factory-installed Key Stop mechanism, but do not include an operating mortise cylinder. Unlike the S KS alarm-only version, the SK KS kit includes the magnetic contact and 24VAC transformer. Gray W-CYL KA includes a conventional keyed-alike cylinder, and Black/Gray MC65 each include a conventional factory-installed cylinder that is not automatically keyed alike. Confirm the exact facility keying and compatible installation requirements before ordering.

Key Features and Benefits

• Approximately 100 dB audible alert: Piezoelectric horn warns of unauthorized use of a monitored door.
• Surface-mount design: Compact housing for installation at a compatible 4-inch × 4-inch double-switch or electrical outlet box.
• Finish and key-control choices: Black Standard; Gray Standard; Gray KS Key Stop; Gray W-CYL KA with keyed-alike mortise cylinder; Black/Gray MC65 with factory-installed conventional mortise cylinder; Black/Gray SK Complete Kits with contact and transformer; Gray SK W-CYL KA with contact, transformer and keyed-alike mortise cylinder; Black/Gray SK IC7 with contact, transformer and factory-installed seven-pin IC housing (removable core and keys extra); or Gray SK KS complete kit with factory-installed Key Stop (operating cylinder extra).
• External AC/DC power: Designed for a suitable Detex-approved hardwired power supply. The six SK kit variants include a 24VAC transformer; the six standard S models require one separately. Optional 9VDC backup battery support is configuration-dependent.
• Key-operated arming and reset: Uses a compatible mortise cylinder with standard Yale-type cam. The conventional mortise cylinder is included with Gray S W-CYL KA, Black/Gray MC65 and Gray SK W-CYL KA, but sold separately on Black Standard, Gray Standard, Gray S KS, standard Black/Gray SK kits, and Gray SK KS. Black and Gray SK IC7 have factory-installed IC housings; the removable interchangeable core, control key and operating keys are not included.
• Selectable alarm functions: Field-selectable silent arming, low-battery alert and two-minute automatic rearm, as applicable to the supplied device and configuration.
• Remote bypass and signaling: Supports compatible remote bypass control and alarm relay output for security system connections.
• Factory-installed KS Key Stop (Gray S KS and Gray SK KS): The operating key may be removed only while the key switch is armed/on, reducing the chance of the alarm being left disarmed. Both variants require a separately purchased compatible operating mortise cylinder; only the SK KS includes the surface magnetic contact and 24VAC transformer.
• Black and Gray MC65 factory cylinders: Conventional 1-1/8-inch Schlage C keyway mortise cylinder, factory-installed in either finish; unlike Gray W-CYL KA, MC65 is not automatically keyed alike.
• SK complete installation kits: All six SK variants include the surface magnetic contact and 24VAC transformer. The standard Black/Gray SK kits do not include an operating mortise cylinder; the Gray SK W-CYL KA adds a keyed-alike conventional cylinder. The Black and Gray SK IC7 variants have factory-installed 7-pin IC housing but no removable core or keys. Gray SK KS includes a factory-installed Key Stop and excludes the operating cylinder.
• Tamper-resistant construction: Protective housing and cover help safeguard alarm electronics.
• Does not delay egress: Audible monitoring detects and reports door opening; it does not hold the door shut or provide delayed-egress locking.

Technical Specifications

Recommended Applications

• Commercial and institutional emergency exit doors
• Retail loss-prevention exits and stockrooms
• Warehouse, distribution center and loading-area doors
• Schools, universities and administrative facilities
• Healthcare, assisted-living and hospital support areas
• Government buildings and restricted staff-only exits

Ordering and Installation Notes

Surface mount vs. flush mount: EAX-2500S and EAX-2500SK are surface mounted; select EAX-2500F or FK for flush mounting. The EAX-2500SK Black and Gray complete kits, Gray SK W-CYL KA complete kit, Black/Gray SK IC7 complete kits, and the Gray SK KS complete kit are selectable options in this listing for installations requiring a bundled surface magnetic door contact and 24VAC transformer. All base S options remain alarm-only configurations.

Ensure the selected door contact, operating cylinder, transformer, wiring and connections match the current Detex installation instructions. Verify any local building/fire code requirements and maintain free emergency egress at all times. For the Gray S KS and Gray SK KS configurations, the factory-installed Key Stop keeps the key captive until the alarm is armed/on; a compatible mortise cylinder and key are still required and are not included. The Gray SK KS kit includes the surface magnetic switch and 24VAC transformer; the Gray S KS alarm-only version does not. For the W-CYL KA Gray version, a conventional factory-supplied keyed-alike mortise cylinder is included; arrange the correct keying for your project before purchase. The Black and Gray MC65 variants each include a factory-installed 1-1/8-inch Schlage C keyway mortise cylinder; neither should be assumed keyed alike to facility locks. For standard EAX-2500SK Black or Gray, the complete kit supplies the surface door contact and 24VAC transformer, but an operating mortise cylinder and field wiring are still required. For EAX-2500SK Gray W-CYL KA, the kit also supplies a keyed-alike conventional mortise cylinder; coordinate project keying before ordering. For EAX-2500SK IC7 Black or Gray, the factory-installed seven-pin IC housing is supplied, but its removable core and keys must be sourced separately. All kits require appropriate field wiring. Batteries and optional accessories should never be assumed included unless explicitly identified in the chosen SKU.