SATEL B-4M Magnetic Contact Sensor for Gates

The SATEL B-4M is a professional-grade magnetic contact sensor designed for outdoor gate, garage door, and industrial door applications. Built with a durable aluminum alloy housing and sealed to IP67, it ensures reliable operation in harsh environments. The sensor features a normally closed (NC) contact configuration and supports a switching voltage up to 20 V DC, making it ideal for integration with alarm systems and access control panels.

Advantages

Robust aluminum alloy construction withstands weather and impact. IP67 rating guarantees protection against dust and water immersion. Long 4-meter cable simplifies installation. Wide operating gap of up to 20 mm accommodates door misalignment. Reliable NC contact ensures fail-safe operation.

Suitable for

• Outer gates and fences
• Garage doors
• Industrial sliding doors
• Perimeter security systems

Key specifications

• Product Type: Magnetic Contact Sensor
• Contact Configuration: Normally Closed (NC)
• Max Switching Voltage: 20 V DC
• Max Switching Current: 20 mA
• Max Switching Power: 1 W
• Operating Gap: Up to 20 mm
• Cable Length: 4 m
• Housing Material: Aluminum Alloy
• IP Rating: IP67
• Operating Temperature: -25°C to +70°C
• Mounting: Surface Mount
• Connection: Wired (2-wire)
• Color: Grey

Recommendations

For optimal performance, ensure the sensor is mounted with the gap within 20 mm and the cable is protected from mechanical damage. Pair with a compatible alarm panel that supports NC inputs.