Alarm Lock PG21 MS Series Narr...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$448.55
$198.55
Alarm Lock Alarm Lock PG21 MS Series Narrow Stile Door Alarm, Surface Mount ALA-PG21Alarm Lock Alarm Lock PG21 MS Series Narrow Stile Door Alarm, Surface Mount ALA-PG21

Alarm Lock PG21 MS Series Narrow Stile Door Alarm with 95dB Siren and Surface Mount

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Model: PG21MSS
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$448.55
$198.55
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Alarm Lock PG21 MS Series Narrow Stile Door Alarm with 95dB Siren and Surface Mount

Advanced Security Solution for Commercial Door Monitoring

The Alarm Lock PG21 MS Series delivers professional door security monitoring with surface mount installation and microprocessor-controlled operation. This narrow stile door alarm provides reliable protection against unauthorized door access with a powerful 95dB sweeping siren alarm and LED status indicators. Designed for commercial applications including schools, nursing homes, restaurants, and theaters, the PG21 features dual arming modes, entry delay options, and battery-powered operation for versatile security deployment.

Professional Features & Benefits

  • Powerful 95dB Sweeping Siren: Provides audible alert that can be heard throughout facilities to immediately notify of unauthorized door access.
  • Dual Arming Modes: Standard and "always armed" modes offer flexible security configurations to match operational requirements and prevent accidental disarming.
  • Multiple Entry Delay Options: 15 seconds, 1 minute 15 seconds, and 3 minutes 15 seconds allow customization for authorized access while maintaining security.
  • Surface Mount Design: Easy installation on narrow stile doors without complex modifications or structural changes to existing door hardware.
  • Battery Powered Operation: Long-life 9V battery with low battery alert ensures reliable operation without hardwired power requirements.
  • Multiple Door Monitoring: Built-in external reed switch capability allows monitoring of multiple doors from a single control unit.
  • Dual-Tamper Supervision: Self-contained design with tamper protection prevents unauthorized disabling or manipulation of the alarm system.
  • Microprocessor-Controlled Operation: Advanced electronic control ensures reliable performance and consistent alarm response in commercial environments.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Exit Devices and Trim
  • Product Group: Exit Devices and Trim
  • Product Subgroup: Exit Control Locks and Alarms
  • Product Type: Door Alarm
  • Series: PG21 Series
  • Subcategory: Door Alarms

Installation & Operation

  1. Mount the unit in a suitable location with appropriate clearance and access for connections and service.
  2. Connect door sensor and external reed switch following applicable guidelines and manufacturer instructions.
  3. Install 9V battery and configure arming mode according to operational specifications.
  4. Configure entry delay settings (15 seconds, 1 minute 15 seconds, or 3 minutes 15 seconds) per application requirements.
  5. Test door monitoring and siren operation to verify proper 95dB alarm function and LED status indicators.
  6. Complete final inspection and verify tamper protection features are functioning properly. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • School Emergency Exit Doors
  • Nursing Home Stairwell Access
  • Restaurant and Theater Rear Exits
  • Commercial Building Fire Escape Routes
  • Retail Store Security Doors
  • Healthcare Facility Controlled Access
  • Multi-Tenant Building Common Areas

Tamper-Resistant Design

The PG21 features dual-tamper supervision with self-contained design that prevents unauthorized disabling or manipulation of the alarm system, ensuring continuous security monitoring in commercial environments.

Why Choose Alarm Lock Quality?

Alarm Lock PG21 Series door alarms deliver proven commercial-grade security with microprocessor-controlled reliability and dual-tamper supervision. The surface-mount design ensures professional installation flexibility while maintaining robust security monitoring capabilities for demanding commercial environments where dependable door security is essential.

Product Specs

Subcategory:
Door Alarms
Series:
PG21 Series
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Control Locks and Alarms
Product Type:
Door Alarm
Commercial/Residential:
Commercial
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Alarm Lock PG21MSS – Frequently Asked Questions

1) Will the Alarm Lock PG21 door alarm mount on a narrow stile aluminum storefront door?
That is what the PG21 MS Series is built for. It's a narrow stile door alarm with a surface mount body, so it goes on the face of the door and stile without cutting the door or reworking the existing hardware. Self-contained and battery powered off a 9V, so there's no need to pull power to the opening either. Aluminum (US28) and dark bronze (US312) finishes both mount the same way.
2) Can one PG21 alarm monitor more than one door?
Yes. The PG21 has a built-in external reed switch capability, so a second opening can be wired back to the single control unit and monitored from it. Useful where a stairwell has a pair of leaves or two adjacent rear exits share one alarm point. The siren and LED status stay at the unit itself, so put the PG21 on the door you want the audible alert at.
3) How do I let staff through a PG21 alarmed exit without setting off the siren?
Use the entry delay. The PG21 offers three settings, 15 seconds, 1 minute 15 seconds, and 3 minutes 15 seconds, which gives an authorized person time to open the door and disarm before the 95dB siren sounds. Fifteen seconds suits a back exit where the keypad is right there; the 3 minute 15 second setting is for deliveries or a receiving door where someone is propping it while they work.
4) Is the PG21 an exit device, or does it go on top of the one I already have?
It's an alarm, not a latching device. The PG21 monitors and sounds on unauthorized use of the door; the panic hardware, lock, or latch stays whatever is on the opening now. That is the point of the surface mount narrow stile design, it adds an audible 95dB alert to an exit that already secures itself, without changing how the door latches or how people get out in an emergency.
5) What is the difference between the PG21 standard arming mode and always armed?
Standard mode lets the alarm be armed and disarmed as the operation requires, so a door can run unalarmed during business hours and armed after close. Always armed keeps the unit live at all times and any opening sounds the alarm, which is the setting for a fire escape or stairwell door nobody is supposed to use. Always armed also stops staff from quietly leaving a door disarmed, which is the usual failure on a school or nursing home exit.
6) Should I order the PG21 with the strobe light option?
The strobe is a variant choice made at order time, so decide before you buy, it is not something added later. Take the strobe where the 95dB siren alone won't do the job: a noisy kitchen or loading area, a theater or restaurant where ambient noise buries an audible, or any facility with hearing-impaired occupants who need a visual alert. Both the dark bronze and aluminum finishes are offered with or without it.
7) Does the PG21 door alarm need to be hardwired or run to a panel?
Neither. The PG21 is self-contained and runs on a 9V battery with a low battery alert, so it installs on an existing opening with no conduit, no transformer, and no panel connection. That is what makes it workable in a leased space or an older building where getting power to a rear exit means opening a wall. The only wiring involved is the optional run to an external reed switch if a second door is being monitored.
8) Can someone pull the battery or pry the cover off to kill a PG21 alarm?
The PG21 runs dual-tamper supervision on a self-contained housing, so attempts to disable or manipulate the unit are supervised rather than silent. Microprocessor control drives the alarm response and the LED status indicators show the state at a glance, which is what a property manager wants when walking a building rather than logging into something.
9) What finishes does the Alarm Lock PG21 door alarm come in?
Two: US28 clear aluminum and US312 dark bronze. US28 is the match for standard mill finish aluminum storefront; US312 goes with bronze anodized entrances. Pick the one that matches the door frame rather than the exit device, since the alarm surface mounts on the stile where it reads against the frame.
How fast can I get the Alarm Lock PG21MSS 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 Alarm Lock PG21MSS come with a warranty?
Absolutely. The Alarm Lock PG21MSS 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 Alarm Lock PG21MSS?
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 Alarm Lock PG21MSS from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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