A perimeter intrusion detection system (PIDS) is a long-term investment, typically protecting a site for a decade or more. But the system is only ever as good as the installer behind it. A poorly specified sensor, a rushed site survey, or a supplier with no real maintenance plan can leave you with a system that either misses genuine intrusions or drowns your security team in false alarms.
Before signing a contract, here are the ten questions worth asking any perimeter security installer, what a genuinely qualified answer sounds like, and why each one matters.
Quick Answers: The 10 Questions at a Glance
- Are you NPSA (CPNI) approved? – Look for evidence of approval on named products and installations, not a general claim.
- What accreditations do you hold? – SafeContractor, health and safety certifications, and manufacturer-specific installer training.
- Will you carry out a full site survey first? – A proper installer like us never quotes before assessing terrain, weather exposure, and existing infrastructure.
- What sensor technology do you recommend, and why? – The answer should explain trade-offs specific to your site, not push a single product.
- How will you minimise false alarms? – Ask about calibration, dual-technology verification, and post-installation tuning.
- Can it integrate with my existing CCTV and access control? – A standalone system creates more monitoring work, not less.
- What’s included in the price, and what’s extra? – Get clarity on survey, design, installation, commissioning, training, and groundworks.
- What ongoing maintenance and support do you provide? – Confirm whether support is genuinely 24/7 and whether it’s on-site or phone-based.
- What’s the expected lifespan and warranty? – A confident installer will know these figures for the exact products they’re proposing.
- Can you provide references from similar sites? – Look for direct experience in your sector, not just general perimeter security work.
1. Are you NPSA (CPNI) approved?
For sites handling critical infrastructure, government, or other high-security assets, NPSA (formerly CPNI) approval is often a procurement requirement rather than a nice-to-have. NPSA – the National Protective Security Authority – independently assesses and approves perimeter intrusion detection products and installations against defined performance standards.
Ask the installer directly which of their systems and installations carry current NPSA approval, and ask them to show evidence, not just state it. A supplier who can point to specific approved product lines and named accredited installations is in a different category from one who says their products “meet industry standards” without specifics.
2. What accreditations and certifications do you hold?
Beyond NPSA, look for recognised industry accreditations such as SafeContractor, relevant health and safety certifications, and manufacturer-specific installer certifications for the sensor technologies being proposed. These indicate an installer who invests in doing the job properly and safely – particularly relevant if your organisation has its own contractor compliance requirements to satisfy.
3. Will you carry out a full site survey before recommending a system?
This is one of the clearest signals of a credible installer. If a company is willing to quote a system before walking your perimeter, checking terrain, assessing wildlife activity and weather exposure, and reviewing what’s already in place, treat that as a warning sign. Every site is different – a system that performs well on a flat, exposed industrial estate may behave very differently on a wooded, undulating boundary next to a public footpath.
A proper site survey should assess ground conditions, vegetation, the condition of existing fencing, power and network availability, proximity to public access, and your specific threat profile – not just the length of the perimeter.
4. What sensor technology do you recommend for my site, and why?
There is no single “best” PIDS technology. Vibration sensors, buried cable, fibre optic, microwave, and infrared systems each have different strengths depending on terrain, fence type, budget, and tolerance for false alarms. An installer who recommends the same product regardless of your site’s specifics is fitting you to their catalogue rather than fitting a system to your site.
A good answer will explain the trade-offs – for example, why fibre optic might suit a long, complex boundary better than microwave, or why a buried cable system might be the right call where a discreet, no-visible-hardware solution is required.
5. How will you minimise false alarms?
Nuisance alarms, triggered by wind, wildlife, or weather, are one of the most common complaints with poorly specified or poorly tuned perimeter systems. Ask specifically how the installer calibrates sensitivity, whether the system uses dual-technology detection or verification (such as pairing sensors with CCTV), and what their process is for tuning the system based on real-world conditions after installation.
A vague answer here is often a sign the installer hasn’t had to solve this problem in practice.
6. Can the system integrate with my existing CCTV, access control, and alarm systems?
A perimeter intrusion detection system that operates in isolation is far less useful than one that automatically triggers camera pre-sets, lighting, or access control responses the moment an alert is raised. Ask whether the proposed system integrates with what you already have on-site, or whether you’d be running a separate, standalone system that your team has to monitor independently.
7. What’s included in the installation cost, and what’s an extra?
Get clarity upfront on exactly what the quoted price covers: site survey, design, supply, installation, commissioning, training for your team, and any groundworks or cabling. Ask specifically what would trigger additional costs – unexpected ground conditions, additional cabling runs, or integration work with third-party systems are common examples.
This is also the point to ask for an approximate cost per linear metre, so you can sanity-check the quote against typical UK market rates for the technology being proposed.
8. What ongoing maintenance and support do you provide?
A PIDS is not a fit-and-forget system. Sensors can drift out of calibration, cabling and connectors degrade over time, and vegetation grows back around ground-based sensors. Ask whether maintenance is included or sold as a separate contract, how often scheduled maintenance visits happen, and – critically – what happens if something fails outside business hours. Is support genuinely available 24/7, and is that phone-based, on-site, or both?
9. What’s the expected lifespan of the system, and what warranty do you offer?
Perimeter intrusion detection systems represent significant capital investment, so it’s reasonable to ask how long the hardware is expected to last before major components need replacing, and what warranty terms apply to both the sensors and the installation work itself. Be wary of vague answers – a confident, experienced installer will know these figures for the specific products they’re proposing.
10. Can you provide references or examples from similar sites?
Any experienced installer should be able to point to comparable projects, ideally within your sector, whether that’s critical infrastructure, industrial, utilities, or logistics. Ask if you can speak to an existing client or, at minimum, see a case study describing the site type, the challenge, and the solution delivered.
Frequently Asked Questions
What does NPSA approval actually mean for a PIDS installer?
NPSA (National Protective Security Authority, formerly CPNI) independently tests and approves perimeter intrusion detection products and installation practices against defined UK security standards. An NPSA-approved installer has met performance and reliability benchmarks required for protecting critical national infrastructure and other high-security sites.
How long does a typical PIDS installation take?
This varies significantly with perimeter length, terrain, and sensor technology, but most projects proceed through site survey, design, supply, installation, and commissioning as distinct phases. A reputable installer should give you a realistic project timeline as part of their proposal, not just an installation date.
Should I get more than one quote before choosing a PIDS installer?
Yes. Because sensor technology, site survey depth, and after-sales support vary considerably between suppliers, comparing at least two or three proposals – each based on their own site survey – makes it much easier to spot the difference between a tailored recommendation and a generic one.
What’s the difference between a PIDS installer and a general security contractor?
A specialist PIDS installer focuses specifically on perimeter intrusion detection technology – sensor selection, calibration, false alarm reduction, and integration with wider security systems. General security contractors may offer PIDS as one product among many, without the same depth of technical specialisation in perimeter sensing technology specifically.
About Sysco Technical Solutions
Sysco Technical Solutions is a UK-based specialist in Perimeter Intrusion Detection Systems (PIDS), with over 20 years of experience designing, installing, and maintaining high-performance perimeter security for critical infrastructure, industrial, and high-security sites.
Every system Sysco delivers begins with a full site survey – never an off-the-shelf recommendation – and is custom-designed around the site’s terrain, risk profile, and budget. Sysco’s product range spans fence-mounted, ground-based, and structure-mounted sensor technologies (including the EcoLine, Single Point 3D, NeoLine, and FlexLine systems), giving clients a genuine choice of technology rather than a single fixed solution.
As an NPSA-approved specialist and SafeContractor-accredited business, Sysco provides full design, supply, installation, and commissioning services, backed by 24/7 aftersales maintenance and support. The company works with organisations across critical national infrastructure, utilities, oil and gas, data centres, and other high-security sectors throughout the UK.
Book a free, no-obligation site survey and put these questions to us directly: Get in touch or call 01772 621716.
