Magnetic Contact Sensor SATEL B-2-BR — cylindrical door/window contact, surface-mounted, brown

Satel KONTAKTRON B-2-BR is a cylindrical magnetic contact sensor intended for monitoring the open/closed status of doors and windows. The device is surface-mounted and uses a magnetic reed switch to detect relative movement between the sensor body and the magnet. Its compact, low-profile brown housing is designed to blend with wooden or metal frames while providing reliable contact detection for alarm panels and security systems.

Advantages

The cylindrical design and surface-mounted format simplify installation on a variety of frame types without the need for recessed mounting. The magnetic reed switch provides stable, low-power operation suitable for connection to standard alarm inputs. The brown finish offers a discrete aesthetic for wooden and dark-coloured frames, while the compact dimensions minimise visual impact. The sensor's straightforward mechanical principle ensures long-term reliability and minimal maintenance.

Suitable for

• Surface mounting on wooden or metal door and window frames
• Integration with alarm control panels and security systems
• Perimeter intrusion detection for residential and commercial premises
• Retrofit installations where recessed mounting is not possible

Key specifications

• Type: cylindrical magnetic contact (reed switch)
• Mounting: surface-mounted
• Colour: brown
• Operating principle: magnetic field detection between sensor and magnet
• Compatibility: designed for connection to standard alarm inputs and panels
• Profile: compact, low-profile housing suitable for narrow frame faces

How to use

Mount the cylindrical sensor body and its matching magnet on the fixed frame and the moving sash or door so that they align when closed, leaving the recommended gap specified by the alarm system manufacturer. Secure the components to the surface using appropriate screws or adhesive, ensuring stable mechanical fixation and correct magnetic alignment. Connect the sensor leads to the alarm panel input following the panel's wiring diagram and polarity instructions. After installation, test the contact by opening and closing the door or window to confirm reliable state changes at the control panel.

Usage recommendations

Place the sensor and magnet to minimize exposure to mechanical shock and avoid mounting locations with strong external magnetic fields. For best performance, observe the manufacturer-recommended gap and wiring practices, and verify contact operation during system commissioning and regular maintenance checks.