Honeywell 940WH Mini Surface Mount Alarm Sensor

The Honeywell 940WH is a mini surface mount contact designed for use in professional intrusion detection and alarm systems. As a surface mount device, it attaches directly to door and window frames without requiring recessed installation, making it well suited for retrofit projects, hard-to-drill surfaces, and environments where a clean, low-profile installation is needed. It operates as a sensing element that signals the alarm control panel when a protected opening is disturbed, forming a fundamental layer of perimeter protection in commercial and residential security installations. Professional installers value the 940WH for its straightforward mounting process, its compact form factor that minimizes visual impact, and its reliability as a genuine Honeywell component within a broader intrusion detection architecture.

Key features & benefits

• Surface Mount Design — Mounts directly onto the surface of door and window frames, eliminating the need for routing or recessing into the frame material and simplifying installation across a wide range of construction types.
• Compact Form Factor — The mini profile keeps the device visually unobtrusive, making it appropriate for installations where aesthetics are a consideration alongside security performance.
• Perimeter Detection Role — Functions as a contact sensor at entry points, communicating an open or closed state to the connected alarm control panel and serving as a primary line of perimeter defense.
• Retrofit Friendly — The surface mount approach allows the 940WH to be added to existing door and window assemblies without structural modification, reducing labor time and material costs on upgrade projects.
• Genuine Honeywell Component — Sourced as an authentic Honeywell product, ensuring consistent quality and compatibility within Honeywell-based intrusion and alarm system installations.
• Professional Grade Reliability — Designed for use by commercial security integrators and professional installers who require dependable, repeatable performance across large or multi-site deployments.