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Modern alarm systems are classified into security grades to define the level of protection for buildings and facilities. The European standard EN 50131 (and similar national regulations) distinguishes between four security levels: Grade 1 to Grade 4. For private homes and small businesses, Grades 2 and 3 are the most relevant.
This article explains the differences between these two grades, when each one makes sense, and why Grade 3 is rarely necessary in most private and commercial environments.
Security Grade 2: Protection for Moderate Risk
Grade 2 is the most common choice for private homes and small commercial properties. Systems in this category provide reliable protection against opportunistic burglars using simple tools such as screwdrivers, pliers, or basic lock-picking equipment.
Key features of Grade 2 systems:
Certified and tested components such as detectors, control panels, and door/window sensors
Resistance against attacks with simple tools
Monitoring of doors, windows, and indoor areas using motion detectors
Optional connection to monitoring centers or mobile notifications via app or SMS
Typical applications:
Private houses and apartments
Small offices, medical practices, and retail stores without high-value goods
Advantages:
Sufficient protection for normal risk levels
Cost-effective and easy to install
Can be combined with smart home functions
Security Grade 3: High Protection for High-Risk Properties
Grade 3 is designed for properties with a significantly higher risk of burglary or sabotage. These systems must withstand attacks using professional tools and more advanced methods.
Key features of Grade 3 systems:
Highly robust and tamper-resistant certified components
Protection against advanced burglary tools such as drills, bolt cutters, and leverage tools
Redundant alarm transmission paths (for example acoustic, visual, and direct connection to a monitoring center)
Strict installation and supervision requirements
Typical applications:
Banks, jewelry stores, and warehouses with high-value goods
Buildings with special security requirements
Important note:
For most private homes and small businesses, Grade 3 is usually excessive. The higher costs for equipment, installation, and maintenance often outweigh the actual risk. In everyday situations, this level of security is rarely required.
Comparison Table: Security Grade 2 vs. Grade 3
| Feature | Security Grade 2 | Security Grade 3 |
|---|---|---|
| Target group | Private homes, small businesses | Luxury properties, banks, jewelry stores |
| Resistance level | Simple tools (screwdrivers, pliers) | Professional tools (drills, bolt cutters) |
| System complexity | Standard certified components | Highly secure, tamper-resistant components |
| Redundant alarm paths | Optional | Mandatory |
| Installation requirements | Moderate | Complex, professional installation required |
| Costs | Moderate | High |
| Typical use cases | Residential areas, small shops | High-risk and high-value locations |
Conclusion: Grade 2 Is Enough in Most Cases
Private sector: For houses and apartments, Security Grade 2 is usually fully sufficient.
Commercial sector: Only properties with high-value assets or elevated risk truly require Grade 3.
Cost-benefit ratio: Grade 3 systems involve much higher costs and complexity, without offering significant advantages for normal risk environments.
Practical tip:
Consult a certified security professional to perform a proper risk assessment. This ensures that you choose the right security grade—strong enough for your needs, without unnecessary expense or complexity.
With the right security grade, you can protect your property effectively while keeping costs and system complexity under control. For most households and small businesses, Security Grade 2 offers the best balance between protection, affordability, and ease of use.