In short
The security grade measures an alarm system’s resistance to tampering under the European standard EN 50131. In Spain, systems connected to a monitoring centre must meet a minimum grade by risk: grade 2 for homes and small shops and grade 3 for regulated, higher-risk premises. The security company confirms the required grade in each case.
Security grades
| Grade | Risk | Typical use |
|---|---|---|
| Grade 1 | Low | Systems not connected to a monitoring centre. |
| Grade 2 | Low to medium | Monitored homes and small shops. |
| Grade 3 | Medium to high | Regulated premises (e.g. jewellers or banks) and other higher-risk sites. |
| Grade 4 | High | Critical infrastructure and very high risks. |
What changes between grade 2 and 3
- Stronger protection against tampering and detector masking.
- Stricter supervision of communications and power.
- Detectors, keypads and panels certified for that grade.
- Maintenance and inspections under private security regulations.
Important
This summary is indicative. Monitoring is provided by licensed security companies, which determine the grade required for each installation and carry out mandatory maintenance.