In the elevator system, waterproof micro switches are not only the core node of signal transmission, but also the key insurance of the safety mechanism. Elevators have extremely high requirements for the response speed, durability and environmental adaptability of components, and ordinary switches are not up to the task. Why must waterproof grade products be selected? What tasks do they each perform in car limit, door lock feedback and safety braking?

So, what kind of micro switches are used in elevators? Why do you need to use waterproof grade products? What specific tasks do these micro switches perform in practical applications? This article will analyze them one by one for you with professional micro switch manufacturers.

What Type Of Micro Switch Does The Elevator Use?

The elevator does not use an ordinary micro switch, but a waterproof micro switch with dust and water resistance, high mechanical life, and IP67 protection level. It has excellent sealing performance and can work stably for a long time in a humid, dusty, and even occasionally water-influent environment. However, there are many types of waterproof micro switches, such as the subminiature sealed micro switches commonly used in automobiles, the G5W11 waterproof and dustproof micro switch, and the G11 DPDT waterproof micro switch used in industry.

If you do not connect the type of waterproof micro switch, it is recommended to browse the Unionwell waterproof micro switch page, which has a variety of waterproof switch types. If you do not understand waterproof micro switches, please read 《What is a waterproof micro switch?》

Why Use Waterproof Micro Switches In Elevators?

Humidity And Dust Challenges In The Shaft

The operating space of the elevator is mainly concentrated in the shaft and the machine room. Although these two areas are relatively closed, their environment is not ideal. Especially in humid areas in the south or underground places, the inside of the shaft is in a state of high humidity and high temperature difference all year round. If the ventilation in the elevator shaft is not smooth, it is very easy to form condensation water and penetrate into the switch, causing problems such as contact short circuit, oxidation, and failure.

In addition, some elevator shafts will inhale a lot of dust and building residues. If the switch structure is not sealed, impurities will enter the mechanical parts, which will accelerate wear and tear, and directly lead to failure in severe cases. The waterproof micro switch has a fully sealed shell design and corrosion-resistant material selection, which can effectively prevent the intrusion of dust and water vapor and ensure the long-term stable operation of the contacts.

Durability And Reliability Requirements

The operating frequency of elevator micro switches is extremely high, especially for components used in door lock systems and limit detection, which may need to withstand hundreds to thousands of mechanical movements every day. Under such working conditions, ordinary switches are prone to problems such as spring fatigue and contact melting. High-quality waterproof micro switches usually use silver alloy contacts and imported high-elasticity reed materials. They are designed to support more than 1 million mechanical lifespans and 200,000 electrical lifespans, meeting the requirements of GB7588 (elevator safety regulations) and EN81 series standards.

What Is The Role Of Waterproof Micro Switches?

Top/Bottom Limit Switch Layout

In the elevator control system, the most critical protection mechanism is the limit switch. It is usually installed at the top and bottom of the shaft. When the elevator car runs to the limit position and still does not stop, the limit switch cuts off the control signal to prevent serious accidents such as "rushing to the top" or "squatting at the bottom".

These limit switches must have excellent environmental interference resistance, accurate reliability and fast action mechanism, so waterproof micro switches are the best choice.

Idle Deceleration Trigger

When the car is unloaded or idle without passengers, the system decelerates or statically controls through the micro switch feedback signal. For example: when it is detected that the car is close to a certain floor but no one is operating, the trigger switch can notify the main controller to decelerate in advance, thereby reducing energy consumption and improving system operation efficiency.

Safety Brake Detection

During elevator operation, once overspeed or abnormal displacement is detected, the system will start the emergency braking procedure. At this time, the micro switch will participate in the signal confirmation of the speed limiter safety clamp mechanism to confirm whether the safety clamp is correctly in place and whether the braking action is in place.

These actions must be completed within milliseconds and fed back to the main control system. In such applications, waterproof micro switches must have high-speed action response, anti-interference signal output, and extremely low false operation rate to ensure accurate protection during failures.

How To Maintain The Micro Switch Of The Elevator?

Although the waterproof micro switch has good sealing performance and long life design, it still needs regular inspection and maintenance to extend its service life. Maintenance suggestions include:

• Perform a functional test once a quarter: confirm whether the switch action is sensitive, whether there is hysteresis or no action through manual triggering;
• Check whether the terminal connection is firm: avoid looseness and signal loss;
• Confirm that the sealing part is not damaged or aged: especially the rubber sealing ring and button cover;
• Clean up the surrounding debris and dust: avoid accumulation affecting the switch activity;
• Perform action life assessment: regularly count the number of switch actions, and consider replacement plans for frequently used areas;

Regular maintenance not only helps to improve the stability of the elevator system, but also reduces the safety risks and maintenance costs caused by sudden failures.

Unionwell Solutions And Industry Success Stories

Domestic Elevator OEM Application Examples

Unionwell cooperates with many well-known elevator manufacturers, covering multiple application scenarios such as passenger elevators, freight elevators, and machine room-less elevators. In a well-known domestic residential elevator project, the ordinary limit switches originally used by the customer frequently failed in humid southern cities, resulting in high maintenance costs. After replacing them with G3 ultra-small waterproof micro switches, the 12-month failure-free rate reached 99.97%, which greatly reduced operation and maintenance costs and improved end-user satisfaction.

Unionwell Micro Switch Manufacturer Advantages

Unionwell is China's leading waterproof micro switch manufacturer, focusing on the research and development and production of high-performance sealed switches. Its products have passed IP67/IP68 and multiple international certifications, and are widely used in home appliances, automobiles, elevators and other fields, supporting OEM/ODM customization and fast delivery. Compared with other manufacturers, Unionwell has the following advantages:

• Independent molds + fully automated production lines, with an annual production capacity of over 300 million;
• The sealed switch meets the IP67 protection level and has passed multiple international certifications such as UL, CE, CQC, etc.;
• Support OEM/ODM customized development, and can customize the installation structure, travel range, and wiring method according to the special requirements of the elevator structure;
• Fast response, stable delivery, sufficient stock of conventional products, and fast delivery within 7 days.

Unionwell's engineering team can collaborate with elevator manufacturers to develop, intervene in the design at the beginning of the project, provide electrical performance testing, structural packaging suggestions and technical analysis support, and is a trustworthy long-term partner.

Conclusion

In the elevator, a highly automated and safety-focused vertical transportation system, the waterproof micro switch is not an optional component, but the "trigger core" that determines whether the entire system operates stably. It undertakes many key tasks such as limit protection, status feedback, and safe braking. Its protection level, stability, and service life are directly related to the operating safety and user experience of the elevator system.

If you are looking for a waterproof micro switch solution for elevators, please contact Unionwell, a micro switch manufacturer, to provide professional and reliable safety micro switch solutions for your elevator system.