Types of business alarms according to activity
The main types of business alarms are categorised by their detection function (intrusion, fire or combined systems) and by their degree of security (grade 1, 2, 3 and 4), which is the criterion that determines what level of protection is required by regulations and insurers. The correct choice depends on the activity carried out on the premises, the level of risk, the value of the assets and the legal requirements that apply to each type of establishment.
In Barcelona and in municipalities in the metropolitan area such as L'Hospitalet, Badalona and El Prat, most businesses that install alarm systems do so to protect themselves against burglary during closing hours. However, a full technical assessment of the building should also consider fire protection and, in many cases, access control as part of a comprehensive security scheme. Before going into the specific technologies, it is useful to understand the security grades, because they are the classification used by both the law and security companies to define which business alarm system each business needs.
Business alarm security grades: grades 1, 2, 3 and 4
Spanish regulations classify alarm systems into four grades according to their level of protection, reliability and resistance to sabotage. This classification, contained in the UNE-EN 50131 standard, is the starting point for choosing the right type of alarm for a business, because it determines which elements are mandatory and which establishments are legally obliged to a particular grade.
Grade 1: Basic protection (not recommended for business)
This is the lowest level and covers minimal risks. It has no mandatory number of components or connection to a central station, and is normally limited to deterrent signage or alerts to the owner's mobile phone. It is not recommended for any business with assets to protect, as its actual response capacity is very limited.
Grade 2: the standard for most shops
Grade 2 alarms are the most common in businesses and commercial premises. They incorporate connection to an Alarm Receiving Centre (ARC), motion detectors and magnetic sensors, and are designed to deter non-specialised thieves and offer a standard level of protection. For most offices, shops, workshops and small businesses in Barcelona, the grade 2 is the balanced solution between cost and security.
Grade 3: mandatory for high-risk businesses
Grade 3 is designed for establishments with high value goods or risk of organised robbery. It incorporates video surveillance, seismic detectors, reinforced protection against signal inhibition and supervised communication with the ARC. It is mandatory by law for certain activities: Order INT/316/2011 of the Ministry of Interior requires grade 3 alarm for establishments such as jewellery shops, lottery administrations, petrol stations, betting shops and entities handling cash or high-value goods.
Grade 4: critical facilities
This is the highest level, reserved for security-critical installations (sensitive infrastructures, entities with special requirements). Its use is highly regulated and outside the usual range of a conventional business. As a general rule, a business in Barcelona will move between grade 2 and grade 3.
| Grade | Risk level | Connection to CRA | Type of usual business | Mandatory by law? |
| Grade 1 | Under | No | Not recommended for business | No |
| Grade 2 | Medium | Yes | Shops, offices, workshops, standard retail outlets | No (but often required by insurers) |
| Grade 3 | High | Yes (supervised) | Jewellery shops, pharmacies, petrol stations, lotteries, betting shops | Yes, in regulated activities |
| Grade 4 | Very high | Yes (redundant) | Critical facilities | Yes, in very specific cases |
ARC-connected alarms vs. non-quota alarms
Beyond the grade, one of the most decisive decisions for a business is whether the system will be connected to an Alarm Receiving Centre or not. It is, together with the grade, the factor that most conditions the real protection and the monthly cost.
Monitored alarms (connected to ARC)
An alarm connected to a CRA is supervised 24/7 by a control centre which, when an alarm is triggered, verifies the event (by means of image, audio or sensor sequence) and, if necessary, notifies the Security Forces and Corps. This verification is key: it reduces false alarms and allows a priority police response. For any business with merchandise, cash or valuable equipment, connection to CRA is the recommended option, and in grade 3 establishments it is a direct legal requirement. These systems operate on a monthly monitoring fee basis.
Unmonitored alarms (without quota)
No-fee alarms are not connected to a central station: notifications are sent directly to the homeowner's mobile phone, who must personally verify the situation and notify the police. They are cheaper in the long run because there is no fee, but they shift all the responsibility for response to the user. They make sense in spaces without valuables or as an add-on, but they are not a substitute for a monitored system in a business that operates with stock or cash.
Wired, wireless and video-verified alarms
In addition to the grade and connection to the central station, business alarm systems are differentiated by the type of installation and whether or not they incorporate image verification.
Wired versus wireless
Wireless alarm systems use radio frequency or Wi-Fi to connect their components; they require no building work and are quick to install and expand, making them the most popular choice for most premises. Wired alarms physically connect the devices, providing maximum communication reliability and resistance to interference; they are commonly used in high-security installations or large premises where the robustness of the wiring outweighs the complexity of the installation.
Alarms with cameras and video verification
Camera systems allow both the property owner and the security monitoring centre to visually check what is happening on the premises in real time. This video verification speeds up the confirmation of a burglary or robbery and is one of the features that sets high-end systems apart. The integration of video surveillance with the alarm system is also the basis for the combined solutions described below.
Intruder alarms for premises and businesses in Barcelona: key technologies
Anti-theft systems for businesses in Barcelona use three detection technologies, which can be combined in a single installation depending on the characteristics of the premises.
Volumetric detectors for indoor use
PIR (passive infrared) detectors are the most common component in commercial alarm systems: they detect the presence of people by detecting changes in body temperature within their field of view and can cover large indoor areas with just a few devices. Dual-technology detectors — PIR plus microwave — are installed in premises with variable environmental conditions, such as warehouses with draughts or spaces with frequent temperature changes, to minimise false alarms.
Magnetic sensors and perimeter security
Magnetic sensors on doors and windows trigger an alarm if they are opened whilst the system is armed. In high-street shops in towns such as Badalona or Sabadell, perimeter detectors, active infrared barriers or seismic sensors are often added to shop windows to act as a first line of defence before an intruder gains access to the premises.
Seismic detectors for high-value premises
Seismic detectors pick up the vibrations caused by an impact before a forced entry occurs. They are installed in jewellers, pharmacies, gaming establishments, tobacconists and any shop with a safe or display windows containing valuable items. Under Spanish private security regulations, these establishments are required to have approved alarm systems connected to a monitoring centre and, in many cases, to be Grade 3 certified.
Types of fire alarms for commercial premises
Fire detection systems are mandatory in certain premises under the Fire Protection Installations Regulations (RIPCI) and are recommended in any premises where there is a risk of fire. They can be integrated into the same control panel as the intrusion alarm, which simplifies management and connection to the monitoring centre.
Smoke and heat detection and fire suppression tailored to the specific activity
Optical smoke detectors are suitable for standard offices and commercial premises, whereas in industrial kitchens, warehouses containing combustible materials or areas with a high fire load, heat detectors or pyroelectric detectors are used, which respond to a sudden rise in temperature. Where required by the nature of the activity, these systems are supplemented by automatic fire suppression: sprinklers in most cases, or gas-based suppression in areas where water would damage stock or equipment. The RIPCI specifies the minimum floor area and type of activity at which these systems are mandatory.
Combined alarm systems: intrusion, fire and video surveillance
Combined systems integrate intrusion and fire detection into a single alarm control panel, allowing all alerts to be managed from a single control point and simplifying the connection to the monitoring centre with a single monitoring contract. This solution is common in more complex businesses: logistics warehouses, office buildings, data centres and premises with a high risk in both categories.
In Barcelona and towns such as Sant Cugat and Cornellà, alarm systems for businesses that integrate intrusion, fire and video surveillance into a single platform allow the system to be expanded without duplicating the communications infrastructure with the monitoring centre. Integration also facilitates event correlation: if a camera detects movement and a detector is triggered at the same time, the response can be prioritised and verified more quickly.
What types of alarms are required by law for each type of business?
Spanish private security regulations specify which premises are required to have various types of approved security alarms. Generally speaking, these are mandatory in jewellers, pharmacies, financial institutions, gaming establishments and betting shops. In these cases, the system must meet the security grade established by the UNE-EN 50131 standard in accordance with the property’s risk level, usually grade 3, and the installation must be carried out by a company registered in the National Register of Security Companies.
For other commercial activities, business alarm systems are not always required by law, but insurers usually make them a condition for cover against the risk of theft. The table below summarises the type of system required for each business profile:
| Type of business | Recommended grade | Connection to CRA | Key elements |
| Office | Grade 2 | Recommended | PIR, magnetic, wired panel |
| Standard shop or business | Grade 2 | Recommended | Volumetric, perimeter, camera |
| Warehouse or logistics facility | Years 2–3 | Yes | Dual technology, perimeter security, video surveillance, fire detection |
| Jewellery | Year 3 (compulsory) | Yes (supervised) | Seismic, video, anti-burglary, anti-jamming |
| Pharmacy | Grade 3 | Yes | Seismic data, video, supervised connection |
| Petrol station | Year 3 (compulsory) | Yes | Video, anti-robbery, anti-jamming |
| Lottery administration / betting shop | Year 3 (compulsory) | Yes | CCTV, seismic sensors, anti-robbery button |
Understanding the differences between the various types of security alarms available enables you to make an informed assessment of installation proposals and understand the actual level of protection each solution offers.
How to choose between the different types of alarm systems for your business in Barcelona
Choosing the most suitable type of alarm system for a business in Barcelona depends on several factors that should be analysed before requesting any installation quotes. The first is the main type of risk: a warehouse with a high volume of stock and few external access points has a different risk profile to a jewellery shop with a shopfront in a pedestrianised area. The second factor is the regulations applicable to the business, which may stipulate the minimum standard of the system and the requirement to connect to a monitoring centre. The third is the available budget, which determines whether a basic system is installed or one integrated with CCTV and access control.
It is worth bearing in mind the cost: the price of a business alarm system depends on three factors—the equipment, the installation and the monthly monitoring fee (for systems connected to a security monitoring centre). A Grade 2 system connected to a monitoring centre has a moderate initial cost, whereas a Grade 3 system with video surveillance, seismic detectors and anti-robbery protection requires more equipment, a more complex installation and, therefore, a greater investment. For this reason, the final figure can only be confirmed following a site visit.
Once these factors have been identified, the recommended course of action is to arrange a preliminary site visit so that the installer can assess any vulnerabilities and propose a system design based on technical criteria. At Dumo Seguridad, we offer a free, no-obligation site visit; you can contact us via this link.
Frequently asked questions about types of business alarms
What type of alarm is a business required by law to have?
It depends on the type of business. Most businesses are not legally required to install an alarm, although insurers usually insist on it. However, certain establishments such as jewellers, petrol stations, lottery outlets, betting shops and businesses that handle cash or high-value goods are required under Order INT/316/2011 to install a Grade 3 system connected to a monitoring centre, installed by an approved security company.
Should I opt for Grade 2 or Grade 3 for my business?
Level 2 is sufficient for most standard shops, offices and premises: it includes a connection to a security monitoring centre, motion detectors and magnetic sensors. Grade 3 is necessary (and mandatory for certain activities) when the business handles high-value goods or cash, as it adds video surveillance, seismic detectors and enhanced protection against sabotage and signal jamming. If your business is not among those subject to regulation, Grade 2 is usually sufficient; if you handle exposed valuables, it is advisable to consider Grade 3.
How much does a business alarm system cost?
The cost comprises three parts: the equipment, the installation and the monthly monitoring fee for systems connected to a CRA. A Grade 2 system involves a moderate initial investment plus a monthly fee, whilst a Grade 3 system with video surveillance and seismic detectors entails a higher cost due to the greater amount of equipment and the complexity of the installation. The exact price depends on the size of the premises, the number of devices and the required grade, so it is finalised following a site visit.
Is connection to an alarm monitoring centre compulsory?
It is not generally mandatory, but it is required for premises classified as Level 3. For all other businesses, it is highly recommended, as the CRA monitors alarm triggers and alerts the police 24/7 – something that a system without a subscription leaves entirely up to the business owner.
What is the difference between an intruder alarm and a combined alarm?
An intrusion alarm detects unauthorised access (movement, opening, vibration). A combined alarm system integrates intrusion detection, fire detection and, often, video surveillance into a single control panel, allowing all alerts to be managed from a single point and under a single monitoring contract. This is the standard option for industrial units, large offices and high-risk businesses.
