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  • Why Do You Need A Safety Relay Module?
    Why Do You Need A Safety Relay Module? Nov 04 , 2022
    Why do you need a safety relay module?There are many types of intelligent Relay modules. With the rapid development of science and technology, the application fields of intelligent relay modules will become wider and wider, such as mechanical control in industry 、automatic door openers, lighting control switches in civil use, and other automatic system control occasions.Usually, the wiring mode of...
  • Types of electric mortise locks
    Types of electric mortise locks Nov 07 , 2022
    Electric mortise locks are divided into: two-wire electric mortise locks, five-wire electric mortise locksTwo-wire electric mortise lock: There are two wires, red and black, red is connected to power +12VDC and black is connected to GND. Disconnect either wire, the lock retracts, and the door opens. The two-wire electric lock is relatively simple in design and has no single-chip control circuit. T...
  • Learn about electric RIM locks
    Learn about electric RIM locks Nov 17 , 2022
    Electric RIM lock is a kind of electric lock with a large amount of use. It can be opened electronically or with a key. It is mostly used in building intercom doors (also called electric doors) in residential areas. It is the veteran of electric locks. For a period of time, it represented the electric lock, and now people often use the electric lock as a general term for all electric locks. Howeve...
  • Installation method and precautions of door closer
    Installation method and precautions of door closer Nov 21 , 2022
    The door closer is installed on the door. Its function is to close the door automatically when the door is opened. Its characteristic is that it can accurately close the door to the initial position. Door closers are widely used in our lives. It is mainly used in commercial and public buildings, but also in domestic use. Its biggest function is to close the door tightly in case of fire, so as to p...
  • What is the classification and working principle of electric mortise locks?
    What is the classification and working principle of electric mortise locks? Nov 24 , 2022
    What is an electric mortise lock? Maybe many people don't know what is an electric mortise lock? What are the classifications of electric mortise locks, and what is the working principle of electric mortise locks.First. What is an electric bolt lock?1. The electric mortise lock is an electronically controlled lock. On the premise of the cooperation of the "magnetic sheet", the extens...
  • The Application Of Electric Rim Lock
    The Application Of Electric Rim Lock Nov 25 , 2022
    Electric Rim Lock is also called a motor lock. Its unlocking and locking are not driven by electromagnets like other electric locks. The unlocking and locking of the Electric Rim Lock are driven by a motor, which is why it is also called a motor lock. The appearance of the electromechanical spiritual lock is very similar to the electric control lock, but the working principle is very differen...
  • About the installation of smart door locks, you should know these!
    About the installation of smart door locks, you should know these! Nov 28 , 2022
    With the development of society, smart products gradually enter ordinary families, bringing convenience to people's lives, but for installation, it is not a simple matter. Let's take a look at what problems need to be paid attention to in the installation of smart door locks today!01. During the installation process of the smart lock, it is necessary to measure the width and thickness of t...
  • What is a Magnetic Door Sensor?
    What is a Magnetic Door Sensor? Dec 01 , 2022
    The principle of  Magnetic Door SensorDimension Security Intelligent Door Magnetic Alarm is a convenient and practical safety protection device. It is composed of a switch and a magnet. The switch part is connected by a magnetic reed switch through a lead wire and packaged in a final shape. The magnet part is encapsulated in a plastic or alloy casing by a magnet with a corresponding magnetic ...
  • How to adjust the closing force of the sliding door with the door closer
    How to adjust the closing force of the sliding door with the door closer Dec 08 , 2022
    What is a door closer? The door closer is a spring-like hydraulic device on the door head. When the door is opened, it can be compressed and released to automatically close the door. It has the function of a spring door and can ensure that the door is closed to the initial position accurately and in time after it is opened. The working principle of the door closer is:When the door is opened, ...
  • What is a wireless doorbell?
    What is a wireless doorbell? Dec 08 , 2022
    Advantages of wireless doorbells1. The wireless doorbell has relatively strong mobility and strong expansibility. It can get rid of the limitation of wiring. Within the set coverage area, users can easily ie into the furniture equipment network.2. Low cost and low power consumption: The home wireless smart doorbell conforms to the green and intelligent life concept of low-carbon life, and users ca...
  • What is the main role of door holder
    What is the main role of door holder Dec 15 , 2022
    The main function of the door stopper is to stabilize it through the magnetism of the door stopper, which can prevent the door and door handle from hitting the wall, and can also prevent it from being blown by the wind to automatically close, playing a fixed role.Door stoppers are usually installed on the wall behind the door or on the ground, so they can be divided into wall stoppers and ground s...
  • Not only quarantine, intelligent door magnetic application know how much
    Not only quarantine, intelligent door magnetic application know how much Dec 19 , 2022
    A sudden outbreak of the novel coronavirus, let people know the intelligent door magnetic product.   This device greatly reduces the inspection pressure of epidemic prevention personnel at centralized quarantine sites, and uses the Internet of Things communication means to help regulators manage quarantine personnel around the clock, improving work efficiency.   As the epidemic has becom...
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Contact Us
  S4A-Security For All.S4A Industrial Co., Limited, Founded in 2010, We have been dedicating in access control production R&D and sales for 10year till now. With the belief that we do one thing well in a lifetime, our CEO has been in this industry for 15 years. During the past 10 years, our products have been exported to various countries and regions. And 90% of customers come from the recommendations of cooperative customers, and 80% of the turnover comes from cooperative customers in the past 10years.Your business is a plant, we are the gardener, our mission is to water and fertilize the plant, and make it become the towering tree. We attach great importance to the partner's appeal, customer's suggestions, and feedbacks. To strengthen Product quality awareness, client's service awareness. Our clients and S4A are on the same path walking for many years.       S4A's future would be even more brilliant, this is related to all of our staff's working sweat. When you join this team, you will feel an invisible power to drive walk forward. S4A mainly produces a series of security Door Access Control such as:Network Access Controller, Locker board, Electromagnetic lock, Standalone door Controller, Automatic door opener, etcOur team can manufacture products, sell products, and do after-sales.In the realm of access control, one company stands out for its unwavering commitment to providing security services for everyone. S4A, which stands for "Security for All," has been at the forefront of access control technology for the past 13 years. With its own state-of-the-art factory and a strong focus on research and development, S4A has continuously delivered cutting-edge access control machines with the latest functions. Their dedication to product quality, customer feedback, practicability, and cost performance sets them apart as a leader in the industry.Factory and R&D Expertise:S4A takes pride in its fully-equipped factory, where skilled engineers and technicians work tirelessly to develop and manufacture access control solutions that meet the highest standards. The company's investment in research and development has resulted in a steady stream of innovative products that cater to evolving security needs.By staying ahead of the curve, S4A ensures that their customers have access to the latest advancements in access control technology.Quality Assurance and Customer Feedback:At S4A, product quality is of paramount importance. The company adheres to rigorous quality control procedures throughout the manufacturing process to guarantee the reliability and durability of their access control machines. Each product undergoes comprehensive testing to ensure it meets industry standards and exceeds customer expectations. S4A also places great value on customer feedback, actively seeking input to continuously improve their products and services. By listening to their customers, S4A maintains a customer-centric approach and delivers solutions that address real-world security challenges.Practicability and Cost Performance:S4A understands that access control solutions must not only be technologically advanced but also practical and cost-effective. The company's emphasis on practicability means that their products are designed to be user-friendly, easily integrated into existing systems, and adaptable to various environments. S4A's access control machines are known for their intuitive interfaces, simple installation processes, and seamless compatibility with other security systems. Additionally, S4A strives to provide cost-effective solutions without compromising on quality. Their competitive pricing ensures that security is accessible to businesses and individuals of all sizes.With 13 years of industry experience, S4A has cemented its position as a leading provider of access control solutions. Through their dedication to "Security for All," the company has set a benchmark for excellence in product quality, customer satisfaction,practicability, and cost performance. S4A's in-house factory and research and development capabilities enable them to stay at the forefront of technological advancements in the field of access control. As the company continues to evolve and innovate, S4A remains committed to empowering individuals and organizations with the highest level of security, ensuring that everyone can enjoy the peace of mind that comes with a reliable and efficient access control system.We can create value for you!Quality takes great importance for a company's credibility, and buyer's every penny spend must worth it. That is our most basic principle. Our business mainly for wholesale, so we could offer large quantities at competitive prices. During the past 10 years, We work hard to create value for our customers, and with our help, customers have an increasing market share. 99% of the customer...<
  • Address

    Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.

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    0086 755 29450011

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If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

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