Alarm Lock Sirenlock 250 / 260 Exit Alarm — US28 Aluminum, Standard or Weatherproof
$344.00
Alarm Lock Sirenlock 250 / 260 — Clapper-Plate Exit Alarm
Alarm Lock Sirenlock 250 / 260 are UL-listed clapper-plate exit alarms that deter unauthorized exit use with a loud 95 dB dual-tone siren, while allowing instant egress in emergencies. Battery-powered (9V), non-handed, surface-mounted; accepts a standard rim cylinder for arming/disarming from outside. 250 offers changeable two-minute cutoff or constant alarm; 260 offers changeable two-minute auto-reset or manual reset. Weather-resistant WP variants available.
Lead time: US28 Aluminum is commonly stocked; WP and “L” (24″ plate) versions vary by distributor.
- VendorAlarm Lock (NAPCO)
- Models250 (cutoff/constant) • 260 (auto-reset/manual)
- Power9V battery (audible low-battery warning)
- Sounder95 dB dual-tone piezo (≈10′)
- Dimensions18″ W × 8-1/2″ H × 3-1/4″ D (std) • 24″ W (L)
- MountingSurface; center ≈ 38″ A.F.F.; single or pair doors
- CylinderStandard rim cylinder (sold separately)
- Weight (ship)≈ 10 lb
- ComplianceUL Listed; meets/exceeds ADA & relatching requirements
- US28 — Anodized Aluminum (standard for 250/260, incl. WP)
Other colors are on different Sirenlock models (e.g., 700 Red/Duranodic); call for specials.
| Operation | Arms with door closed; opening triggers siren; exterior key controls arm/disarm |
| Alarm Modes | 250: 2-min cutoff or constant • 260: 2-min auto-reset or manual reset |
| Temperature | Std: ~20°F to 135°F • WP: ~-20°F to 140°F (outdoor-rated) |
| Plate Widths | Standard 18″ • Long 24″ (“L” models) |
| Includes | Unit, battery, template; cylinder/accessories ordered separately |
Use case: Back-of-house exits, retail stock doors, stair towers—where an audible alarm deters unauthorized exit.
Installation Difficulty
Level 2 — Skilled DIY: Template layout, cylinder prep, and alarm-mode jumper selection.
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Features
- Units are non-handed to facilitate easy field installation
- Meets requirements of the Buy American Act
Specs
- RAIL: Extruded aluminum
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