Door Guard comparison: Basic or with pre-alarm? | All differences, advantages & applications

Securing escape and rescue routes is a legal obligation for operators of buildings open to the public. At the same time, doors must remain freely accessible in an emergency, but must not be used without authorization. Door guards offer a standard-compliant solution and are used in public facilities, schools, daycare centers, industrial buildings, and healthcare facilities .

In this comparison, we explain the differences between the Door Guard Basic, the Door Guard with Pre-Alarm, and the easy-NB Door Guard. All models provide security at emergency exits, but follow different approaches. This article will help you choose the right system for your requirements.

AlertLatch Door Guard Basic - Single Lock Cylinder
AlertLatch Door Guard Basic - Single Lock Cylinder
AlertLatch Door Guard with pre-alarm - single lock cylinder
AlertLatch Door Guard with pre-alarm - single lock cylinder
AlertLatch IoT Door Guard – Single Lock Cylinder
AlertLatch IoT Door Guard – Single Lock Cylinder
Gehäusematerial
aluminum
Zinc - die casting
Zinc - die casting
Gehäusefarbe
RAL 6032
Ral 6032
RAL 6032
Material obere Abdeckung
ABS, injection molding
ABS, injection molded
ABS, injection molded
Farbe obere Abdeckung (o. Voralarm)
RAL 6032
RAL 3001
RAL 3001
Verbauter Profilhalbzylinder
30/10
30/10
30/10
Mit Voralarm ❌ ✅ ✅
Akustische Batteriewarnung
Yes, warning at 15% remaining battery capacity
Yes, warning when battery has 15% remaining capacity
Yes, warning when battery has 15% remaining capacity
Batteriestatus per Smartphone ❌ ❌ ✅
Automatische Alarmabschaltung ❌ ✅ ✅
Zeiten für automatische Alarmabschaltung
-
1 minute, 5 minutes
1 minutes, 5 minutes
easy-NB-Integration ❌ ❌ ✅
Abruf von Alarmzählungen ❌ ❌ ✅
Alarmmeldungen aufs Smartphone ❌ ❌ ✅
Go to the door guard overview
Türwächter Basic ohne Voralarm

Türwächter Basic – einfache und zuverlässige Fluchtwegsicherung

Der Türwächter Basic bietet eine funktionale und kosteneffiziente Lösung, wenn es um die Sicherung einzelner Bereiche oder wenig frequentierter Türen geht. Der Alarmton wird erst ausgelöst, wenn die Türklinke betätigt und die Tür geöffnet wird. Das Modell eignet sich besonders für Bereiche, in denen kein erhöhter Kontrollbedarf besteht.

Türwächter Basic entdecken

  • Typical areas of application

    • Storage and technical rooms
    • workshops
    • Human Resources
    • Side entrances without public access
    • Buildings with manageable risk

  • Advantages

    • easy assembly and commissioning
    • user-friendly operation
    • legally compliant escape route securing
    • affordable entry-level solution
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Mobilfunk-Türwächter – vernetzte Fluchtwegsicherung mit Fernüberwachung

Der Mobilfunk-Türwächter digitalisiert die klassische Fluchtwegsicherung, indem er digitale Kontrolle und Fernüberwachung integriert. Alarmmeldungen, Statusmeldungen und Informationen zum Batteriezustand werden über die easy-NB-Plattform direkt auf Ihr Smartphone übertragen. So haben Verantwortliche jederzeit den Überblick.

Mobilfunk-Türwächter entdecken

  • Typical areas of application

    • Industrial and production facilities
    • Logistics centers and warehouses
    • Critical infrastructure
    • Public buildings with central monitoring
    • Branches and locations without permanent supervision
    • Security-relevant doors with documentation requirements

  • Advantages

    • Alarm messages on your smartphone
    • Remote monitoring via the easy-NB platform
    • Access to alarm counts and status information
    • Battery level monitoring for predictable maintenance
    • Less monitoring effort thanks to digital transparency
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Door guard with pre-alarm – greater control in security-critical areas

The door guard with pre-alarm activates a pre-alarm as soon as the door handle is pressed. If the door is then opened further, the main alarm is automatically triggered. The pre-alarm acts as a deterrent and prevents incorrect operation by unauthorized persons.

AlertLatch Einhand-Türwächter mit Voralarm oval - gleichschließender Zylinder - AlertLatch

Türwächter mit Voralarm – mehr Kontrolle in sicherheitskritischen Bereichen

Der Türwächter mit Voralarm aktiviert bereits bei Betätigung der Türklinke einen Voralarm. Wird anschließend weiter geöffnet, folgt automatisch der Hauptalarm. Der Voralarm wirkt abschreckend und verhindert Fehlbedienungen durch Unbefugte.

Türwächter mit Voralarm entdecken

  • Typical areas of application

    • Schools and kindergartens
    • Administrative buildings with visitor traffic
    • Hospitals, nursing homes, and doctors' offices
    • Public institutions and government agencies
    • Production areas with safety zones

  • Advantages

    • Additional control level through pre-alarm
    • ideal in combination with supervisory duties
    • Minimizes false alarms
    • Increased security in sensitive areas
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Our recommendation

If you are looking for a straightforward solution for securing escape routes, the Basic door guard is a safe and cost-effective choice. However, if you are concerned about misuse, incorrect operation, or supervisory duties, the door guard with pre-alarm is the better option.

If you require remote monitoring, alarm notifications, or central control, then the mobile door guard with easy-NB connection is just right for you.

Frequently asked questions about door guard models

What is the difference between the basic, the pre-alarm and the easy-NB models?

The basic model reliably secures escape doors without an acoustic warning.

The pre-alarm model also features an integrated alarm that sounds as soon as the door handle is activated, before the door is actually opened. This immediately signals any intentional or unintentional use of the door – ideal for public buildings or heavily frequented areas.

The easy-NB model supplements remote monitoring and digital control. Thanks to the easy-NB platform, operators have access to the status of the secured door at any time and from anywhere.

Which model is suitable for which applications?

Door guard basic: Ideal for private, commercial or less frequently used doors where the opening of the door itself should trigger the alarm signal.

Door guard with pre-alarm: Recommended for schools, care facilities, hospitals or public buildings where misuse or incorrect operation should be detected early

easy-NB door guard: Digitizes escape route security and enables operators to monitor remotely.

Can I install all models later?

Yes, all door guards can be retrofitted without interfering with the emergency exit function.

Installation is possible either by screwing or gluing onto (glass) frame doors.

No electrical installation is required.

How does the pre-alarm work technically?

When the door handle is pressed, the pre-alarm triggers an acoustic signal before the door is actually opened.

The alarm duration is factory-set to 1 or 5 minutes. After this time, the device switches off automatically or can be manually reset.

What happens when the battery capacity is low?

All models feature battery level monitoring.

As soon as the remaining capacity falls below 15%, the door guard issues a warning message – in time before the battery needs to be replaced.

Are there differences in the casing material?

Yes.

Basic model: Aluminum case
Pre-alarm model: Zinc die-cast with ABS cover
easy-NB model: Zinc die-cast with ABS cover

All versions are robust, impact-resistant and finished in RAL 6032 (green) .

How do the maintenance costs differ?

All systems require little maintenance , as no wiring is necessary. Only the battery should be checked or replaced every few years.

Can I get special conditions for large quantities?

Yes. For large projects, series production, recurring projects or facility management orders, AlertLatch offers attractive special conditions for major customers .

What mounting options are available?

Several mounting kits are available for both models:

  • L-angle mounting plate for glass and frame doors
  • Adhesive plate for drill-free installation
  • Direct mounting for wooden or steel doors

This allows the appropriate option to be chosen for almost any door situation.

Can I combine the models with different locking cylinders?

Yes, all door guards are optionally equipped with

  • keyed alike,
  • single-closing or
  • without lock cylinder

available and can be integrated into existing locking systems.