Magnetic Reed Switch / Contact Sensor KONTAKTRON BOCZNY KN-04 — No name

KONTAKTRON BOCZNY KN-04 is a compact magnetic reed switch designed for side-mount installation on doors and windows. This no-name kontaktor provides a mechanical magnetic switching function: the internal reed contacts close or open when a magnet is brought into proximity. It is intended for use in alarm circuits, tamper detection loops and simple on/off sensing where a reliable, low-cost magnetic contact is required.

Advantages

The KN-04 offers a small footprint and straightforward side-mounted form factor that simplifies installation in narrow frames. Its passive reed design requires no local power to operate and provides a durable, low-maintenance switching element for long-term use. Compatibility with standard alarm and security inputs makes it suitable for both new installations and retrofits.

Suitable for

• Door and window security contacts in residential alarm systems
• Tamper detection on cabinets and service panels
• Basic position sensing in light-commercial equipment
• DIY security and automation projects requiring a passive magnetic sensor

Key specifications

• Device type: magnetic reed switch (side-mounted kontaktor)
• Activation method: magnet proximity (mechanical reed contact)
• Mounting: side installation suitable for narrow frames
• Electrical characteristic: passive, normally open / normally closed depending on wiring configuration (reed contact)
• Typical applications: alarm circuits, tamper loops, simple switching tasks
• Physical: compact housing designed for concealed mounting

How to use

Install the KN-04 on the fixed frame of a door or window so the matching magnet is attached to the moving leaf. Align the magnet and reed switch faces so the required action occurs when the door or window is closed. Connect the reed switch leads to the alarm input or control circuit according to the system wiring: as a normally closed or normally open contact depending on the monitored panel requirements. Verify correct operation by moving the door or window and confirming that the control panel registers open and closed states.

Usage recommendations

For reliable performance, mount the sensor in a stable position where neither the switch nor the magnet is subjected to heavy mechanical stress or moisture. Use compatible magnet strength and maintain a small air gap as specified by the system designer; avoid strong impacts and exposure to corrosive environments. Test the contact state after installation and during routine maintenance checks.