Graded intruder detection, engineered to the risk and the standard
We design, install and maintain commercial intruder alarm systems to EN 50131 and PD 6662, specified at the correct security grade for the threat and your insurer's requirements. Every system is built for confirmed alarm verification, dual-path signalling to a 24/7 Alarm Receiving Centre and police response by URN. For large, complex and multi-occupancy sites, we engineer zoning, part-setting and perimeter detection that fit how the building is actually used.
The right grade for the risk, evidenced in the specification
Grade is a design decision, not a default. We assess the threat, the asset and your insurer's terms, then specify and document a system that meets the standard.
EN 50131 & PD 6662
Systems designed and installed to EN 50131 and the PD 6662 scheme, with the security grade (typically Grade 2 or 3 for commercial premises) matched to the assessed risk.
Risk-based grading
We carry out a documented risk assessment to determine the appropriate grade, environmental class and detection strategy before any equipment is specified.
Insurer-aligned
Specifications are written to satisfy insurer and policy conditions, with as-fitted documentation and certification to evidence compliance for underwriters.
Detection technology
Dual-technology and anti-mask detectors, sequential confirmation and tamper protection selected to reduce false activations while maintaining catch performance.
Confirmed alarms, dual-path signalling and police response
Detection only matters if the right people respond. We connect graded systems to a 24/7 ARC over resilient signalling, with confirmation that supports a police URN.
Dual-path signalling
Dual-path signalling (DD / SPT) over IP and cellular paths, monitored for integrity so a single failed route does not leave the site unprotected.
24/7 ARC monitoring
Alarms are received and actioned around the clock at a monitoring centre, with documented escalation to keyholders and emergency services.
Confirmation & police response
Sequential and camera-verified confirmation supports a police Unique Reference Number (URN) and a Level 1 police response where the risk warrants it.
Camera-verified alarms
Integration with CCTV lets the ARC visually verify activations in real time, cutting false dispatches and giving operators eyes on the incident.
Zoning, part-setting and perimeter detection that fit the building
Large, multi-occupancy and distributed estates need detection designed around how people move and work. We zone and structure systems to match operations.
Zoning & part-setting
Independent areas and part-set programmes let occupied zones stay active for staff while unoccupied wings, floors or tenancies remain fully armed.
Perimeter & external detection
External-grade detection, beam and curtain coverage and perimeter protection extend the line of defence beyond the building envelope.
Multi-occupancy buildings
Segregated user groups, areas and reporting suit shared sites, managed buildings and tenants who need their own setting and audit trail.
Multi-site estates
Consistent grading, signalling and reporting across every site, so estates and security teams manage a portfolio to one standard.
Integrated with CCTV and access, maintained to SLA
Intruder detection works best as part of a wider security picture. We integrate across systems on open standards and keep them compliant with planned maintenance.
Access integration
Coordinate setting and unsetting with access control so the system reflects who is on site and which areas are in use, reducing user error.
CCTV integration (ONVIF)
Open-standard, ONVIF-based integration links detection to camera verification and recording for a single, evidential view of any event.
Planned maintenance to SLA
Scheduled servicing and inspection to the grading scheme keep the system compliant and insurer-ready, with response times defined by SLA.
Remote diagnostics
Continuous monitoring of system and signalling health flags faults early, so issues are addressed before they affect protection or certification.
Commercial security & tender FAQs
All commercial installations are designed, installed and commissioned to EN 50131 and PD 6662, with the security grade and environmental class determined by a documented risk assessment of the site. As an SSAIB and BAFE approved company established in 1997, work is delivered to recognised certification scheme requirements, and signalling and monitoring arrangements are specified to align with the police response criteria set out in the relevant standards. Documentation, grading rationale and certification can be provided to support compliance and insurance requirements.
Graded detection devices are configured so that an alarm requires sequential or otherwise confirmed activation before it is treated as a genuine event, which reduces false alarms and supports a police response under the current ACPO/NPCC policy. Signals are transmitted via dual-path signalling to our 24/7 Alarm Receiving Centre, where operators verify the activation and request police attendance where the confirmation criteria are met. Maintaining a low false-alarm rate and the correct signalling path is essential to retaining a Unique Reference Number and police response on the site.
Yes. Built on the Ajax ecosystem, commercial systems scale from single units to multi-zone and multi-site estates, with consistent grading, centralised monitoring and standardised specifications across a portfolio. We support procurement processes including PQQ and ITT responses, can work within framework arrangements, and provide the technical documentation, method statements and DPIA input that facilities, estates and procurement teams typically require. Nationwide delivery is available for commercial contracts alongside the core Essex and Suffolk coverage.
Monitored systems are connected to our own 24/7 Alarm Receiving Centre, providing round-the-clock alarm handling, escalation and keyholder or police notification in line with agreed procedures. Maintenance is delivered through scheduled preventative service visits and reactive call-outs under a maintenance agreement, keeping the system compliant with EN 50131 and PD 6662 servicing requirements. Response and attendance times can be defined within an SLA to suit the criticality of the site and any contractual obligations.
Commercial engagement begins with a site survey and risk assessment, from which a graded system specification to EN 50131 and PD 6662 is produced for review. From there we can respond to a tender, PQQ or ITT, supply technical and compliance documentation, and agree the installation programme, monitoring and maintenance arrangements. To discuss requirements or arrange a survey, contact the team on 01255 436150 or via the head office in Clacton-on-Sea, Essex.
Start with a risk-based survey and specification
Every commercial intruder system we deliver begins with a site survey and a documented, grade-justified specification written to your insurer's requirements. Talk to our team about a survey, a design for tender, or a specification for your procurement process.