Alarm Lock PG21MS Narrow Stile Door Alarm, Surface Mount, Aluminum

Prevent unauthorized entry and eliminate risky door propping with the Alarm Lock PG21MS Narrow Stile Door Alarm. Designed for institutional and commercial environments, this surface-mount door alarm provides an immediate audible deterrent (95 dB) and visible status via an LED — ideal for schools, retail, healthcare and theater applications where real-time monitoring and fast response matter. The PG21MS is battery-powered with a long-life 9V battery and low-battery alert, while also supporting optional external power for continuous operation. Two selectable arming modes, programmable entry delays (including 15 sec and 3 min options) and tamper-resistant housing let facility managers tailor protection to their security policies without complex system changes. Compact, narrow-stile compatibility and straightforward surface mounting make installation fast and cost-effective for retrofit projects. Integrate this Alarm Lock door alarm into your broader security and surveillance strategy to improve perimeter control and reduce insider risk. Strengthen your access monitoring — order the PG21MS to upgrade door security across your facilities today.

• Stops door propping and unauthorized access with a loud 95 dB siren to deter intruders and reduce security breaches
• Surface-mount, narrow-stile design installs quickly on metal frames to minimize downtime and retrofit costs
• Battery-powered 9V operation with low-battery alert and optional external power for continuous protection
• Selectable arming modes and programmable entry delays give flexible control for schools, retail, and healthcare settings
• Tamper-resistant construction plus LED indicator and optional strobe provide clear visual status for monitoring teams
• Simple, self-contained unit reduces integration complexity with existing security and surveillance programs