Camelott® External Slave Sounder
The Camelott® External Slave Sounder extends your lockdown coverage outdoors, providing a loud siren and bright beacon in playgrounds, yards, car parks, and external entrances so people outside receive the same clear lockdown alert as those indoors.
Outdoor spaces are often the hardest part of a site to control in an incident. This unit is designed to make the instruction unmistakable: high-output audio,
a high-visibility beacon, and synchronised site-wide activation. The core alert remains independent of Wi-Fi, 4G and building networks.
Where required, Camelott can also reinforce the same event with PC screen pop-ups, mobile notifications and screen text display messaging for staff who need written confirmation.
Lockdown Alert Sounds
Listen to typical tones and alerts designed for high-recognition outdoor environments.
Overview
The Camelott® External Slave Sounder is a weather-resistant wireless unit designed to take your lockdown alarm outdoors.
It receives the same secure RF signal as your internal devices and delivers a clear audible and visual alert to people in playgrounds, outdoor walkways,
car parks and external waiting areas.
It is ideal for schools, academies, nurseries, business parks and public venues that want outdoor coverage without running new cabling or relying on Wi-Fi or network infrastructure.
Alerts are synchronised across the site code, helping ensure people outside receive the same instruction at the same time as occupants indoors.
What Makes It Different
- Outdoor clarity: loud siren + bright beacon designed to cut through ambient noise and distractions.
- Independent by design: the core alert remains operational even if networks drop or power is disrupted.
- Designed for live sites: wireless deployment avoids trenching, containment and external cabling runs.
- Expandable without replacement: add more sounders, call points and buildings without starting again.
- Multi-channel reinforcement (optional): PC pop-ups, mobile alerts and screen text display messaging for written instruction.
Key Features
- Weatherproof Design: Robust external housing built for all UK weather conditions.
- Wireless Activation: Receives signal instantly from your Master Call Point and remote keyfob.
- High-Impact Alerts: Provides loud, clear audio and a bright visual strobe outdoors.
- Network Independence: Fully wireless operation – no reliance on Wi-Fi, data, or cabled networks.
- Continuous Uptime: Battery powered to ensure operation during site power outages.
- Battery Options: Powered by 2 × D Cell or 6 × AA industrial battery sets (depending on configuration).
- Whole-Site Sync: Synchronised with internal sounders for comprehensive lockdown coverage.
- Protect Duty Ready: Supports risk planning for sites hosting 200+ members of the public.
How the External Slave Sounder Works
The External Sounder responds when the system is activated to ensure outdoor awareness:
- Trigger: Lockdown is activated via the Master Call Point or a remote keyfob.
- RF Broadcast: The secure RF system sends a signal to all linked internal and external units.
- Activation: The External Slave Sounder switches on instantly alongside all other paired units.
- Reinforcement (Optional): PC screens, mobile devices and text displays can show a matching lockdown message.
- Alert: People outdoors hear the alarm and see the beacon, prompting immediate procedure follow-through.
- Reset: The system is reset via the Master Call Point key once the incident is over.
Typical Applications
This unit is essential for ensuring emergency communication reaches every corner of your estate:
- School playgrounds & MUGA pitches
- External walkways & entrances
- Staff and visitor car parks
- Outdoor assembly points
- Loading bays & warehouse yards
- Public waiting zones
Technical Summary
- Product Type: Wireless External Sounder/Beacon
- Manufacturer: Camelott® UK
- Wireless Type: Secure RF Mesh (Repeater Capable)
- Frequency: 434.525 MHz
- Wireless Range: Up to 1km (Line-of-Sight)
- Power: 2 × D Cell or 6 × AA industrial battery sets (depending on configuration)
- Capacity: Up to 192 units with Camelott expansion
- Compliance: Martyn’s Law / Protect Duty Planning
PC, Mobile & Screen Text Display (Optional)
For sites that require written confirmation alongside the audible and visual alert, Camelott can provide an integrated messaging layer.
When a lockdown is triggered, designated zones can display a matching instruction on PC screens, mobile devices and screen text display signage.
This is commonly selected for visitor-heavy environments, shared-use buildings and campuses where consistent instruction is essential.
The RF sounder remains the primary activation method, with messaging added as a reinforcement layer where required by your risk assessment.

Technical Dimensions

Academy Coverage

Public Venue Alerts
Installation
External Slave Sounders are typically positioned at playground boundaries, external entrances, car parks and high-traffic outdoor routes.
Because the system is wireless and battery powered, installation avoids trenching and disruptive external cabling works — particularly valuable on live school sites and public venues.
Camelott can complete a site survey to advise on placement, coverage, line-of-sight considerations and expansion planning.
Supplied & Supported by Camelott® UK
Camelott provides mission-critical wireless lockdown systems for schools, MATs, SEND environments, and public venues.
We support phased rollouts — starting with core alerting and expanding into outdoor coverage, multi-building estates and multi-channel messaging as your safeguarding plan develops.
Types of Organisations We Support
Supporting sites required to consider Martyn’s Law (Protect Duty):
- Primary & Secondary Schools
- Multi-Academy Trusts (MATs)
- SEND Schools & Inclusion Units
- Theatres & Arts Venues
- Sports Arenas & Gyms
- Public Libraries & Civic Hubs
- Healthcare Trusts & Hospitals
- Museums & Heritage Sites
- Hotels & Large Hospitality Spaces
- Office HQs & Business Parks





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