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Exit Devices/Panic Bars

Panic Bars/Exit Devices and Trim for standard and fire-rated commercial doors, from PDQ, Von Duprin, Adams Rite, and Detex. Our products meet the requirements of the Buy American Act.

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Alarm Lock Sirenlock 250 / 260 Exit Alarm — US28 Aluminum, Standard or Weatherproof

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Alarm Lock Sirenlock 250 / 260 Exit Alarm — US28 Aluminum, Standard or Weatherproof

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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.

Alarm Lock Sirenlock 250 / 260 — Clapper-Plate Exit Alarm

Vendor

Alarm Lock (NAPCO)
Models

250 (cutoff/constant) • 260 (auto-reset/manual)
Power

9V battery (audible low-battery warning)
Sounder

95 dB dual-tone piezo (≈10′)
Dimensions

18″ W × 8-1/2″ H × 3-1/4″ D (std) • 24″ W (L)
Mounting

Surface; center ≈ 38″ A.F.F.; single or pair doors
Cylinder

Standard rim cylinder (sold separately)
Weight (ship)

≈ 10 lb
Compliance

UL 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