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UnionwellProfessional sealed limit switch manufacturer

Unionwell is a micro switch manufacturer specializing in high-quality sealed limit switches with over 20 years of industry experience, including wholesale top-quality sealed roller plunger limit switches, custom sealed limit switches and other businesses. With advanced technology and a professional team, we ensure that our products meet the highest standards of durability and performance. Our sealed limit switches are trusted by companies in multiple industries to provide reliable solutions for challenging environments.


Our sealed limit switches, part of the sealed micro switch family, are designed to withstand tough conditions while maintaining top performance. As a trusted  micro switches supplier， we combine innovation with expertise to deliver reliable, high-precision solutions. By offering advanced technology and tailored products, we meet the diverse needs of clients worldwide, ensuring exceptional quality and long-lasting functionality.

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micro switch in home appliances G6
UNIONWELL

Unionwell excellent performance sealed limit switch

Sealed limit switch is designed for precise control and protection in harsh environments, providing reliable performance in industries such as automotive, industrial machinery and outdoor equipment. With its waterproof and dustproof design, it can effectively cope with applications with moisture, dust or other environmental challenges.

The high-quality hermetically  sealed limit switch has a dielectric strength of up to AC750VRMS (50-60Hz). It operates stably in the temperature range of -25℃ to +85℃ and can withstand a maximum humidity of 85%RH. The sealed limit micro switch weighs approximately 110g (with 8 wires) and is rugged and durable. It is an excellent choice for maintaining operational reliability in humid or dusty environments, and the internal DPDT (double-pole double-throw) circuit configuration allows flexible and versatile switching operations, ensuring uninterrupted functionality under harsh conditions.
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G11  Waterproof and Dustproof DPDT Limit Micro Switch G11

2018-07-16
The Waterproof and Dustproof DPDT Limit Micro Switch G11 ensures reliable performance in extreme environmental conditions.
  • Synopsis: 20kg
  • Classification: Interior wall
  • Product Type: Finish
  • Keyword: Matt
  • Product Link: No
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Large Basic Limit Switch G12-1

G12  Large Basic Limit Switch G12

2018-07-16
Large Basic Limit Switch is waterproof and durable, widely used in industrial equipment
  • Synopsis: 20kg
  • Classification: Interior wall
  • Product Type: Finish
  • Keyword: Matt
  • Product Link: No
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hermetically sealed limit switch SPECIFICATIONS 

Our hermetically sealed limit switches have a variety of technical specifications to meet your various project needs. Including IP level, operating temperature, rated voltage and current, and service life.

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IP lever

There are IP40 and IP67 waterproof levels, which can achieve complete waterproof and dustproof effects.
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Operating temperature range

The hermetically sealed limit switch has strong temperature resistance and can work stably in the temperature range of -25°C to +85°C.
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Rated current and voltage

The typical rated voltage and current of this sealed limit switch are 0.5A 250VDC and 0.5A/5A 250VAC. The rated parameters vary depending on the model.
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Service life

The G11 waterproof limit switch has a long service life, with an electrical life of 50,000 times and a mechanical life of 2 million times, suitable for frequently operated industrial equipment

 Unionwell       

       Customized services

As a leading dustproof limit micro switch supplier , we offer custom design services to meet your specific needs. From tailored switch configurations to unique housing and connector options, our team works closely with you to develop reliable, high-performance solutions.

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Circuit Design

Unionwell offers customizable circuit designs, including SPST, DPDT, and more. Customers can specify current ratings, voltage requirements, and electrical characteristics. Our engineers will design specific custom circuits.

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Dimension Customization

Our sealed limit switches can be customized to fit unique space constraints. We offer a variety of housing sizes and mounting hole locations. Compact designs or other sizes are available upon customer request, ensuring compatibility with equipment of varying sizes.

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Positioning Pin

We offer positioning pin customization options for direct customer installation. Choose between long, short, or custom positioning pins to meet your project needs.

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Operating Lever

The operating lever is fully customizable with different lengths, shapes, and actuation forces. We offer straight, roller, and bent lever designs to meet a variety of mechanical requirements.

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Features of sealed limit switch

The hermetically sealed limit switch has excellent water and dust resistance to ensure optimal functionality in rugged and wet environments. Its versatility is reflected in its use in automotive systems, industrial machines, and outdoor equipment, where it performs well in harsh conditions. With its high durability, the switch is designed to withstand frequent use while minimizing the need for repairs. In addition, it supports multiple lever configurations to meet a variety of mechanical application needs. This makes it a reliable and customizable solution for many industrial needs.

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Excellent waterproof design

The IP67 protection level is achieved, and the circuit and circuit board are sealed inside the switch with internal glue potting technology, which can still operate stably even in humid, dusty or other harsh conditions.
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Multiple applications

A variety of circuit designs are available, including DPDT circuit design, which can control multiple circuits at the same time. Suitable for a variety of application equipment, making it an ideal choice for complex industrial systems.
Customization Services

High durability

The dielectric strength of the sealed limit micro switch is AC750VRMS, which can ensure safe and stable performance even in high-voltage environments, provide long-lasting durability and reduce maintenance costs.
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Multiple Operating Levers

The sealed limit micro switch can be flexibly matched with operating levers according to your needs to meet your various application needs. Excellent waterproof design

Technical advantages and core competitiveness

Unionwell sealed limit switches help you have an absolute competitive advantage in the market.

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    Customization

    Unionwell is a professional custom switch supplier in China, supporting customized design to meet customers' various application needs.

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    Certification 

    Unionwell switch has passed ISO 9001, ISO50001, IATF16949 certification, etc., and its products comply with international safety standards such as UL and CE to ensure quality.

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    Factory direct supply

    Unionwell wholesales micro switches in bulk at factory prices, making your project price more competitive in the market.

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    Complete terminal 

    Sealed limit switch has a complete range of terminal types, and you can choose the appropriate terminal model according to project requirements

Sealed Limit Switch Manufacturing Process

01

Design

Engineers consider application requirements, such as waterproofing and high temperature resistance, and select specific circuit and resistor design drawings.
02

Automated Processing 

Unionwell has introduced advanced equipment in the industry, and 80% of the entire factory has achieved automated processing and manufacturing. The annual production capacity of micro switches exceeds 250 million, greatly improving production efficiency.
03

sealing

The bottom uses glue potting technology to seal the circuit, and the top of the switch is sealed with an O-ring to prevent contaminants such as water, dust or oil from entering the switch housing.
04

Reliability Testing

Each sealed limit switch is rigorously tested to ensure that it meets industry standards. Tests include waterproof testing (IP rating), durability testing of mechanical components, and electrical performance testing.
05

Inspection

Before packaging, each switch undergoes a final quality control inspection. This step ensures that the product meets all specified tolerances, electrical performance standards, and sealing requirements.
06

Packaging and Shipping

After the sealed limit switch passes the final inspection, it will be packaged with moisture-proof materials and prepared for shipment. The packaging is designed to protect the switch during transportation and ensure that it arrives in the best condition for the customer.
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Sealed Limit Switches Application Case

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Electric forklift control system

Sealed limit switches are a type of sealed switch, which are mainly installed in the travel of machine joints to control the travel distance. The limit switch is installed in a pre-arranged position. When the module installed on the moving part of the production machinery hits the travel switch, the contact of the limit switch moves to realize the switching of the circuit.

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Automobile production line equipment

Sealed micro limit switches play an important role in the welding process of the car body. Welding machinery requires high-precision motion control and safety assurance. Waterproof limit switches can accurately detect the end point of the robot arm's movement to prevent equipment damage or welding deviation caused by misoperation. At the same time, its sealed design prevents metal dust and coolant generated during the welding process from entering the switch.

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why choose Unionwell

Unionwell is a professional sealed limit switch wholesale supplier in Huizhou, Guangdong. It has many years of OEM and ODM production experience. It covers an area of ​​more than 65,000 square meters, has obtained CE certification from many countries around the world, introduced industry-leading automated production equipment, and a professional R&D team with 20 years of work experience!
  • 1

    Quality Certification

    We have formed a complete quality management system and have passed ISO9001, IATF16949, ISO14001 certifications, with high-quality and reliable performance!
  • 2

    Efficient Production Capacity

    Unionwell has introduced advanced automated production technology in the industry, with an annual production capacity of more than 250 million switches, including more than 4 million waterproof automotive switches.
  • 3

    Customized Service

    Unionwell has many R&D engineers with 20 years of work experience, and has many years of experience in OEM and customized micro switches, which can meet your various project needs.
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Customer reviews and industry recognition

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Pooja Purchasing Manager
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In the automotive industry, we place high demands on the precision and reliability of each component. Unionwell G11 sealed limit switch performs well and has greatly improved our production process.

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Kara Project Engineer
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Our construction machinery equipment often needs to work in muddy and wet environments. Unionwell's sealed limit switches provide stable performance and long life and are our long-term partner.

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FAQ

  • 1

    What customization options are available for sealed limit switches?

    Unionwell offer a wide range of customization options, including tailored circuit designs, housing sizes, positioning pins, and operating levers. Whether you need specific dimensions or unique configurations, we can adapt our sealed limit switches to your application requirements, ensuring optimal performance in demanding environments. Our team works closely with customers to deliver fully customized solutions for industrial and automotive applications.

  • 2

    What are the benefits of purchasing sealed limit switches in bulk?

    Buying sealed limit switches in bulk can help you get better prices and the opportunity to establish long-term cooperation. As a B2B-focused manufacturer, we offer competitive prices for large orders and ensure timely delivery. Our scalable production capabilities make it easy for you to handle large orders without compromising quality, making us a reliable partner for your long-term business needs.

  • 3

    How ​​are your sealed limit switches tested for reliability and durability?

    Each sealed limit switch is rigorously tested to meet IP ratings and industry standards. We utilize automated equipment to test the switches for water resistance, dust resistance, and high temperature resistance, and only ship them after they meet the testing standards.

  • 4

    Do you provide solutions for unique or complex applications?

    Yes, we specialize in custom-designed sealed limit switches for complex and unique applications. With multiple R&D engineers with more than 20 years of experience and industry-leading equipment, Unionwell is fully equipped to meet your project needs.

  • 5

    Which industries typically use your sealed limit switches?

    Our sealed limit switches are widely used in industries such as automotive, industrial automation, home appliances, and heavy machinery. The durability and waterproofness of sealed limit switches are loved by many industries.

  • 6

    Can you provide technical support and after-sales service for bulk orders?

    Of course. We provide comprehensive technical support to ensure that our sealed limit switches are seamlessly integrated into your system. Our dedicated after-sales service team is always available to help you solve any technical problems or questions that may arise after delivery.

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