SATEL B-3A Surface-Mounted Magnetic Contact Sensor

The SATEL B-3A is a reliable surface-mounted magnetic contact sensor designed for wired alarm systems. It detects the opening of doors, windows, gates, and drawers, providing essential security for residential and commercial premises. The sensor features a normally closed (NC) reed switch and is built with durable ABS plastic housing, ensuring long-lasting performance.

Advantages

Easy surface mounting, compact design, and a wide operating gap of up to 20 mm make the B-3A versatile for various applications. Its IP44 protection class ensures resistance to dust and splashing water, suitable for indoor and outdoor use. The integrated 1-meter cable simplifies installation.

Suitable for

• Doors and windows in homes and offices
• Gates and garage doors
• Drawers and cabinets
• Perimeter security in commercial buildings

Key specifications

• Sensor Type: Magnetic Contact (Reed Switch)
• Mounting Type: Surface-Mounted
• Contact Configuration: NC (Normally Closed)
• Max. Switching Voltage: 20 V DC
• Max. Switching Current: 20 mA
• Max. Switching Power: 3 W
• Operating Gap: Up to 20 mm
• Housing Material: ABS Plastic
• Color: White
• Operating Temperature: -10°C to +55°C
• Environmental Class: II (EN 50131-1)
• Protection Class: IP44
• Cable Length: Approx. 1 m (integrated)
• Number of Wires: 2

Recommendations

For optimal performance, ensure the gap between the sensor and magnet does not exceed 20 mm. Compatible with most wired alarm control panels. Suitable for indoor and outdoor use with IP44 protection.