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Door reed switch sensor BLOW 4925# HO-03N white
Wired door reed switch sensor BLOW 4925# HO-03N white is a magnetic contact sensor designed to detect opening and closing of doors or windows. The compact white plastic casing contains a reed switch operated by a separate magnet; the two-piece design and two-wire connection make it suitable for surface mounting and simple integration with alarm panels, controllers or DIY security setups.
The sensor offers a compact form factor and unobtrusive white finish for discreet installation on door and window frames. Its two-wire wired connection provides a reliable, low-latency contact signal compatible with standard alarm inputs and controllers. The separate magnet and contact allow flexible positioning and straightforward surface mounting without recessed installation.
Mount the contact and the magnet on the fixed frame and moving part (door or window) so that the magnet aligns with the reed switch when closed. Secure both parts to the surface using screws or adhesive as appropriate for the mounting surface. Connect the two wires to the alarm panel or controller zone input according to the control unit’s wiring scheme, observing normally closed or normally open requirements of the system. Test the sensor by opening and closing the door or window to confirm the control unit registers the state change.
For reliable operation, position the magnet within the manufacturer’s recommended gap for the reed switch and avoid placing ferrous materials between the magnet and contact. Use appropriate cable routing and strain relief to prevent wire damage, and verify compatibility with the alarm or control panel input type before installation.
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