SOS 14 Siren-Operated Emergency Access Sensor

Automatic Emergency Gate Access Triggered by First Responder Sirens

The SOS 14 Siren-Operated Emergency Access Sensor provides automatic gate access for approaching emergency vehicles without requiring a code, key, transmitter, or other access credential. When the unit detects a Yelp siren for approximately three seconds, it sends a dry-contact open signal to the connected gate operator, allowing the gate to open for first responders.

The SOS 14 replaces the previous SOS 12 model and incorporates several installation improvements, including revised microphone placement on the underside of the enclosure and improved conduit spacing. Its NEMA 4 outdoor-rated enclosure helps protect the electronics from weather and environmental exposure.

Adjustable siren-detection sensitivity allows the installer to account for site noise and mounting conditions. Relay timing can also be configured so the gate remains open momentarily or for up to one hour. An optional remote microphone extension can be used when the main sensor cannot be positioned for ideal siren reception.

The SOS 14 connects to the gate operator's normally open and common input terminals. It provides the open command only and does not directly power or drive the gate motor.

Key Features

• Replaces the SOS 12 siren-operated sensor
• Detects approaching emergency vehicle Yelp sirens
• Sends an automatic gate-open command after approximately three seconds of siren detection
• Eliminates the need for emergency personnel to enter codes or use remotes
• Adjustable siren-detection sensitivity
• Configurable relay timing from momentary operation up to one hour
• Dry-contact relay output for compatible gate operators
• Improved underside microphone placement
• Rear and bottom wire-entry options
• Improved conduit spacing for easier installation
• NEMA 4 outdoor-rated enclosure
• Optional remote microphone extension available
• Includes emergency-access sign
• 5-year manufacturer warranty

Technical Specifications

• Manufacturer: SOS Gate
• Model: SOS 14
• Replaces: SOS 12
• Product Type: Siren-operated emergency gate access sensor
• Detection Method: Emergency vehicle siren detection
• Trigger: Yelp siren detected for approximately 3 seconds
• Output Type: Dry-contact relay
• Gate Operator Connection: Normally Open / Common
• Relay Rating: Maximum 3A at 30 VDC, resistive load
• Power Input: 9-24 VDC or 9-16 VAC
• Current Draw: 0.1 mA standby; 25 mA while triggered
• Sensitivity: Adjustable
• Relay Timing: Configurable, momentary up to 1 hour
• Gate Operator Compatibility: Automatic gate operators that accept a dry-contact open input
• Enclosure Rating: NEMA 4
• Mounting: Outdoor surface mount
• Recommended Mounting: Microphone opening unobstructed and facing the roadway approach
• Post Compatibility: Designed to fit a 4" post
• Wire Entry: Rear or bottom
• Conduit Knockout: One 1/2" conduit opening
• Wiring Knockouts: Two 1/4" insulated wire openings
• Dimensions: Approximately 7" H x 4" W x 1.5" D
• Weight: 0.6 lb
• Operating Temperature: -4°F to 140°F (-20°C to 60°C)
• Optional Accessory: Remote microphone extension
• Manufacturer Warranty: 5 years
• Country of Manufacture: Taiwan

What's Included

• SOS 14 siren-operated sensor
• 4 mounting screws
• 4" x 5" emergency-access sign
• Installation instructions

Conclusion

The SOS 14 provides a direct way for fire, ambulance, and other emergency vehicles to gain access through an automated gate using the siren already on the responding vehicle. Its dry-contact output allows it to integrate with compatible gate operators, while the updated enclosure, microphone placement, adjustable sensitivity, and configurable relay timing make it more adaptable to outdoor perimeter entrances.

Because the SOS 14 sends an open command to the gate operator rather than operating the gate motor itself, the connected gate system must be properly configured for emergency access and safe gate operation.