If you’re considering a burglar alarm system for your property, you’ve probably come across the phrase “British Standard intruder alarm”. But what does that mean, and do you really need one?
The British and European Standards (BS EN 50131) exist to make sure alarm systems meet strict levels of reliability and performance. For homeowners, landlords, and businesses across the UK, choosing a system that complies with these standards isn’t just about better protection, it could also affect your insurance cover.
In this guide, we’ll explain what the British Standard for intruder alarms is, the different system grades, and which alarms sold by WME (like Ajax and Pyronix) meet those requirements.
📖 Related read: Guide to Burglar Alarms
What Is the British Standard for Intruder Alarms?
The main standard you’ll hear about in the UK is BS EN 50131. It sets out requirements for:
- Alarm system design
- Installation practices
- Maintenance and testing
- System grading for different risk levels
Systems certified to this standard give you confidence that they’ve been tested for tamper resistance, reliability, and performance under real-world conditions.
👉 If you’re looking for alarms that meet these standards, start with our Ajax Security Systems or Pyronix Security Systems.
Why Does British Standard Compliance Matter?
1. Insurance Approval
Many UK insurers insist on a Grade 2 or above system for cover. If you install a non-compliant alarm and suffer a break-in, your claim may be affected.
2. Police Response
For monitored alarms, police will only attend if the system meets British Standards and is maintained regularly.
3. Reliability
Alarms built to the standard are less prone to false alarms, offer better tamper protection, and provide consistent performance over time.
📖 For average installation costs, see: How Much Does a Burglar Alarm Cost?
The Four Grades of Intruder Alarm Systems
| Grade | Risk Level | Typical Use Cases |
|---|---|---|
| Grade 1 | Low risk | DIY systems, sheds, garages |
| Grade 2 | Low to medium | Most UK homes, small businesses |
| Grade 3 | Medium to high | Offices, warehouses, shops |
| Grade 4 | Very high | Banks, government buildings, high-security sites |
- Grade 1 – Rarely used in professional installs.
- Grade 2 – Covers most domestic homes and rental properties.
- Grade 3 – Required for many commercial insurance policies.
- Grade 4 – Specialist installations only.
Both Ajax and Pyronix provide Grade 2 and above systems, meaning they’re suitable for homes, landlords, and small-to-medium businesses.
Ajax & Pyronix: British Standard Compliant Options
Ajax Alarms
Ajax alarms are Grade 2 certified, making them insurance-approved for most UK homes and businesses. They’re:
- Wireless-first for easy installation
- App-controlled for remote management
- Expandable up to 200 devices (sensors, cameras, detectors)
🔗 Explore Ajax Security Kits – Smart Wireless Alarm Systems
📖 Related guides:
Pyronix Alarms
Pyronix is a UK-based manufacturer with a long reputation for compliance and quality. Their systems range from Grade 2 hybrid alarms to Grade 3 commercial setups. Key benefits include:
- Hybrid wired & wireless flexibility
- ProControl+ app for remote arming/disarming
- Scalable for medium and large commercial sites
🔗 Browse Pyronix Security Systems
Related blog: Ajax vs Pyronix Alarms
Other Relevant Standards to Know
- BS 5839 – Fire detection and fire alarm systems.
- BS 8629 – Evacuation alert systems for high-rise residential buildings.
- BS 6266 – Fire protection for electronic equipment installations.
👉 If you’re interested in combining intruder protection with fire safety, check out: Best Smoke & CO₂ Detectors.
FAQs
Q: Do I need a British Standard alarm for my home?
Not always, but if you want insurance approval or live in a higher-risk area, it’s strongly recommended.
Q: Are Ajax alarms British Standard approved?
Yes, Ajax systems are Grade 2 certified, making them suitable for most homes and small businesses.
Q: What about Pyronix?
Pyronix offers both Grade 2 and Grade 3 systems, which are widely used in the UK commercial sector.
Q: Do monitored alarms need British Standard compliance?
Yes, if you want guaranteed police response, your alarm must comply with BS EN 50131.
British Standard alarms aren’t just a technical detail, they’re a vital part of ensuring your intruder alarm system is reliable, insurable, and police-recognised.
For most homeowners and small businesses, Grade 2 Ajax or Pyronix alarms are the perfect balance of protection, smart features, and compliance.
👉 Browse WME’s full range today: