What Is an Arm Barrier? Types, Working Principle and Selection Guide
What Is an Arm Barrier? Types, Working Principle and Selection Guide
What is an Arm Barrier?
An arm barrier is a security system operating with a horizontal boom mechanism designed to provide access control at vehicle entry and exit points. It is widely used to regulate vehicle traffic in parking lots, industrial facilities, airports, military zones, and residential areas.
The core operating principle relies on a motorized drive unit rotating the horizontal arm 90 degrees along the vertical axis to either allow or block vehicle passage. Modern arm barriers can integrate seamlessly with access control systems such as card readers, licence plate recognition systems, remote controls, and biometric devices.
Types of Arm Barriers
Arm barriers are categorized into different types based on their drive mechanisms and intended applications. Each type is optimized for specific usage scenarios.
Hydraulic Arm Barriers
Powered by a hydraulic system, these barriers are preferred for locations requiring heavy-duty operation and intensive traffic management. The hydraulic drive unit ensures durability and a long service life for the barrier. They are widely used in military zones, rail transit systems, and industrial plants. The KRC HAB 600 Series stands out in this category with an arm length of up to 6 meters and a 370W motor power.
Electromechanical Arm Barriers
Operating with brushless DC motors and encoder technology, electromechanical barriers offer advantages such as quiet operation, low energy consumption, and an extended lifespan. The automatic opening feature during power outages provides a critical security advantage. The KRC PRIME, EASY, MINI, and DREAM series constitute our comprehensive range of solutions in this category.
Fence Arm Barriers
Unlike standard arm barriers, fence arm barriers feature an integrated fence structure underneath the arm that prevents pedestrians, children, or animals from passing through. They are ideal for areas seeking complete perimeter security at parking entrances and checkpoints. The KRC PRIME-F Series offers fence arm barrier solutions for boom lengths up to 4.5 meters.
Where are Arm Barriers Used?
The primary application areas for arm barriers include:
- Parking Lots: Shopping malls, hospitals, airports, and residential parking facilities
- Industrial Facilities: Factories, warehouses, and logistics centers
- Military and Security Zones: Military barracks and strategic facilities
- Educational and Healthcare Institutions: Universities and hospitals
- Residential Areas: Gated communities and apartment parking lots
- Government Buildings: Public institutions, municipalities, and embassies
How Does an Arm Barrier Work?
The operating mechanism of arm barriers consists of three main stages:
- Triggering: The vehicle driver provides credentials via an access control device, such as a card reader, remote control, licence plate recognition camera, or token.
- Boom Movement: Upon authorization, the drive motor raises the arm to a vertical position (opening time ranges from 0.6 to 8 seconds depending on the model).
- Automatic Closing: Once the vehicle is detected leaving the passage area via loop detectors or safety photocells, the arm automatically lowers.
In modern barriers, encoders or non-contact sensors ensure precise position control. The soft motion feature extends mechanical lifespan, and the system automatically defaults to an open position during power outages.
How to Choose the Right Arm Barrier?
When selecting a barrier system, the following criteria should be evaluated:
- Traffic Intensity: The higher the daily passage volume, the more durable and high-speed the barrier needs to be. Capable of handling up to 20,000 cycles daily, the KRC DREAM Series is ideal for highway toll plazas.
- Boom Length: The boom length should be selected between 3 and 6 meters based on the width of the entrance.
- Operating Environment: Brushless DC motors are recommended for extreme hot or cold climates. All KRC barriers operate reliably within a temperature range of -20 to +55 °C.
- Power Failure Behavior: For high-security access points, models that automatically open upon power loss should be selected.
- Integration Requirements: If integration with ANPR, card readers, or biometric systems is required, microprocessor-controlled models should be chosen.
Arm Barrier Maintenance and Lifespan
Regular maintenance significantly extends the service life of the barrier system. Periodic maintenance checks should include:
- Motor and gearbox lubrication
- Tightness of arm mounting points and linkages
- Encoder and sensor calibration
- Electrical connections and grounding
- Control board and firmware updates
As KRC Barrier, we provide 24/7 technical support and comprehensive periodic maintenance services for all our products.
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Frequently Asked Questions
If you haven't found the answers to your questions, please contact us.
ContactThe price of boom barriers varies depending on factors such as drive type (hydraulic/electromechanical), boom length, motor power, control system, and additional accessories (LED lights, photocells, loop detectors). For accurate pricing, obtaining a project-specific quote is the most reliable method.
The installation of a standard boom barrier, including ground preparation, is completed in an average of 1-2 business days. If the infrastructure is ready, it can be commissioned the same day.
KRC electromechanical barriers open automatically and remain open when the power is cut off. In hydraulic models, the arm can be controlled manually with a hand pump.
How is the arm length of a barrier determined? The width of the passage point is measured, including the distance of the support leg on the opposite side. KRC barriers offer arm length options between 3 and 6 meters.