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  • Q: 30)Are magnets bad for electronics?

  • A:

    A strong enough magnet can destroy just about any electrical device. Especially laptops, computers, cell phones, hard drives, flash drives, or almost any advanced device. They can even destroy an LED screen. ... The magnets don't damage electronics directly.


  • Q: 31) Are magnetic locks secure?

  • A:

    An electromagnetic lock, magnetic lock, or maglock is a locking device that consists of an electromagnet and an armature plate. There are two main types of electric locking devices. Locking devices can be either "fail-safe" or "fail secure". ... Direct pull electromagnetic locks are inherently fail-safe.

  • Q: 32) Do magnetic fire door holders need to be released manually?

  • A:

    Electromagnetic Fire Door Holders


    The magnet is wired to and powered by the fire alarm panel and is automatically switched off in case of fire, releasing the fire door and allowing it to close. The magnetic fire door retainers can also be manually released via a push button.


  • Q: 33) Can Maglocks be fail secure?

  • A:

    That is until the power is cut. Because mag locks by design require a constant supply of electricity to remain locked, mag locks are fail-safe only — they do not function to keep the door locked from either side when the power is out.

  • Q: 34) How do you open a magnetic lock?

  • A:

    If the door has a knob or handle, push IN on the door firmly, then use the magnet to unlock the door. If the lock is in contact with the strike, it will not unlock with the magnet. The strike should be adjusted to allow the lock to swing freely. If the door has no handle, make one using tape.

  • Q: 35) How do you turn off magnetic security strips?

  • A:

    To deactivate the magnetic security strip, all that need be done is to magnetize the strip along its length. This can be done by applying a sufficiently strong magnetic field along the length of the strip.

  • Q: 36) There is no magnetic attraction between magnet and strike plate

  • A:

    Be sure the lock is being powered by a DC source and that polarity is correct (RED to positive DC BLACK to negative DC). If the Magnalock is wired in reverse polarity, it won't be damaged, but it will not operate.

    If the unit continues to appear dead, it must be electrically checked with an Ammeter. It must be powered with the correct input voltage and checked to see if it draws the specified current. If the unit meters correctly, then the magnet body is operating properly and the problem must lie in the mounting of the strike.


  • Q: 37) What is a magnetic lock?

  • A:

    A magnetic door lock is a lock that uses an electric current to produce the magnetic force. Due to the increased strength because of the current, the doors can withstand pressure, so they can’t be forced open without the use of the confirmed access method.

  • Q: 38) How does a magnetic lock work?

  • A:

    Not unlike what you learn about magnetics, magnetic locks work by north and south end meeting and sealing, but magnetic door locks use an electrical current to produce a stronger magnetic force.


    Magnetic door locks use an electromagnetic force to stop doors from opening, so they are ideal for security. Maglocks, such as the Deadlock mag locks are made up of an electromagnet and an armature plate. The plate is attached to the door and the magnetic to the door frame. Depending on the lock chosen, depends on the voltage – and strength – of the electromagnetic force. The rule of thumb is the more expensive the electromagnetic lock the higher the holding force, it can range anything from 250kg all the way up to an impressive 1000kg.


    An electromagnetic lock creates a magnetic field when energized or powered up, causing an electromagnet and armature plate to become attracted to each other strongly enough to keep a door from opening. As they require power to remain locked, this allows them to be fail-safe, making electromagnetic door locks safe for use as emergency exits. If the power was to go out in a fire via a fire relay or call button, the door would unlock, allowing people to exit the building.


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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.

  • Call us

    0086 755 29450011

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