UnionwellWaterproof Micro Limit Switches - IP67 Sealed Industrial Switches | Unionwell

Unionwell is a leading Chinese manufacturer of waterproof micro limit switches, boasting over 20 years of experience in the R&D and manufacturing of sealed switches. Utilizing automated production equipment, its annual production capacity reaches 300 million units.

Our IP67-rated waterproof micro limit switches feature a sealed design, ensuring stable and reliable operation in harsh environments such as -40℃ to +85℃, high humidity, dust, and outdoor conditions. They are widely used in industrial automation, new energy vehicles, home appliances, and medical instruments. Our products have obtained international authoritative certifications such as UL, cUL, IATF16949, and ISO9001, providing customized switch solutions to customers in over 50 countries worldwide.

Waterproof Micro Limit Switch Factory Price

Unveiling the secrets of the Unionwell automatic production line that produces 300 million switches per year.

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waterproof limit micro switch type

Unionwell has a variety of waterproof limit micro switch types, including the G6 miniature micro switch for home appliances, the subminiature G9A waterproof switch, and the G11 DPDT waterproof and dustproof micro switch for industrial equipment.Welcome to click here to view more waterproof micro switches or similar sealed switches.

Unionwell’s waterproof micro limit switch is engineered for demanding environments, operating reliably from -40°C to +85°C and up to 85%RH humidity. With an IP67-rated sealed structure, it ensures superior resistance to water, dust, and harsh conditions. Designed to handle high current loads, this switch meets international standards including ENEC, UL, cUL, ISO, and IATF16949, making it ideal for industrial machinery, automotive systems, and outdoor equipment.Click the link to view more Unionwell micro switches.

Product Series	Protection Rating	Electrical Rating	Operating Temperature	Typical Applications	Key Features	Document
G3 Series Subminiature	IP67	125/250VAC	-40°C to +85°C	Smart Home, Consumer Electronics	Ultra-compact Size, High Sensitivity	View Datasheet PDF
G5W11 Series Waterproof	IP67	5A/250VAC	-40°C to +85°C	Home Appliances, Sanitary Equipment	Cost-effective, General-purpose Design	View Datasheet PDF
G9 Series Mini Waterproof	IP40 / IP67	125/250VAC	-40°C to +85°C	Automotive Electronics, Medical Devices	Miniaturized Design, High Reliability	View Datasheet PDF
G10B Series for EV Charging Guns	IP65 / IP67	30VDC	-40°C to +85°C	EV Charging Guns, Charging Stations	Long Travel, Extended Service Life	View Datasheet PDF
G11 Series DPDT Limit Switch	IP67	125VAC	-25°C to +85°C	Industrial Control, Safety Interlock Systems	Double Break Contacts, High Load Capacity	View Datasheet PDF
G16 Series Industrial Customized	IP67	250VAC	-40°C to +85°C	Industrial Automation, Heavy-duty Equipment	High Protection Level, Long Service Life	View Datasheet PDF
G19 Series Automotive Seat Adjustment Switch	IP67	15A 14VDC / 8A 12VDC	-40°C to +85°C	Automotive Seats	High Reliability, Excellent Compatibility	View Datasheet PDF
G23 Series Charging Motor Lock Switch	IP67	12VDC	-40°C to +85°C	Automotive Motor Locks, EV Charging Guns	Stable Performance, Long Service Life	View Datasheet PDF

Sealed Subminiature Micro Switch With Inner Res...

Waterproof and Dustproof Sealed Basic Micro Swi...

Customized Designs Miniature Micro Switch G6

Waterproof and Dustproof Sealed Miniature Micro...

Subminiature Seal Micro Switch G10B

Waterproof and Dustproof DPDT Limit Micro Switc...

Waterproof Swing Rotary Switch G16

Waterproof Seat Sealed Adjustment Switch G19

Motor Electronic Lock for Charging G23

Waterproof Micro Limit Switch Structurer

The reliability of waterproof micro limit switches depends on their sophisticated internal structure design. Unionwell waterproof micro switches employ an integrated sealed structure, with six core components working in tandem to ensure stable performance in harsh environments.

● Sealed Housing: Made of high-strength engineering plastics or metal, combined with precision sealing rings, achieving IP67 dust and water resistance, effectively preventing liquids, dust, and oil from entering the internal cavity.

● Actuating Mechanism: Includes various forms such as push rods, levers, and rollers, converting external mechanical motion into internal contact action. Precision molding ensures an actuation accuracy of ±0.05mm.

● Quick-Actuation Mechanism: A specially designed spring sheet structure enables rapid contact switching (action time <10ms), effectively reducing arcing and extending contact life.

● Contact System: Employs silver alloy or gold alloy contacts, offering excellent conductivity and contact resistance <10mΩ. Supports a wide range of applications from mA-level signal circuits to 10A-level power circuits.

● Terminal Blocks: Available in various forms including PCB pins, solder terminals, quick-connect terminals, and wire-connected terminals to meet the connection needs of different installation methods and application scenarios.

● Sealing Components: Terminal areas are encapsulated with epoxy resin or rubber to ensure that the complete protection level is maintained even after wiring, preventing moisture from seeping in along the wires.

Application of waterproof micro limit switch in door control emergency valve

The waterproof micro limit switch is widely used, and the most famous one is the emergency control system of the automotive safety valve. Under normal conditions, the cam presses on the normally closed waterproof micro switch contacts to keep the door cylinder solenoid valve de-energized. However, when an emergency occurs, the air pipe is damaged and the door cannot be opened.

Once an emergency occurs, the passenger turns the external knob, and the cam moves to close the internal normally open waterproof micro switch, sending an alarm signal, while releasing the normally closed contact, connecting the solenoid valve coil, and exhausting the air quickly. At this time, the door can be easily opened by hand to achieve emergency escape in the car.

In fact, there are many applications of micro switches in the automotive field, including car door lock switches, automotive seat adjustment switches, and seat belt reminder switches. Welcome to click to learn more about automotive micro switches and waterproof micro switches.

Get A Free Waterproof Micro Limit Switch Now

A short video showing you the production process of the Unionwell G6 waterproof micro limit switch!

Features of waterproof micro limit switch

In demanding applications such as automotive safety, smart home appliances or industrial control, stable and reliable sealed switches are essential. Unionwell's waterproof micro limit switch has excellent protection performance, international certification guarantee and long life design, and is designed for demanding environments.

IP67 protection level: waterproof and dustproof design, suitable for harsh environments such as humid, dusty, and outdoor
Authoritative safety certification: passed UL, cUL, ISO and other international certifications, in line with global market access standards.
Multiple terminal and operating handle options: flexible adaptation to different installation structures and circuit requirements.
Long life and high reliability: excellent mechanical life and electrical performance, support high-frequency action.

Contact for Waterproof Limit Micro Switch

G9A Waterproof Limit Switch Drawing

waterproof limit switch Professional Selection Guide

Choosing the right waterproof micro limit switch requires comprehensive consideration of multiple factors, including the application environment, electrical parameters, mechanical requirements, and installation method. Here is a 6-step selection method summarized by the Unionwell technical team:

1.Protection Rating:Select based on the operating environment:
IP65 is suitable for dust and splash-proof environments;
IP67 is suitable for short-term immersion and high-humidity, dusty environments;
IP68 is suitable for continuous immersion and high-pressure washing environments.
For general industrial equipment, IP67 is recommended as a starting point.

2.Voltage and Current Ratings:Rated voltage and current must meet the actual circuit requirements; it is recommended to allow for a margin of at least 30%. For DC circuits, special attention should be paid to arc suppression; for AC circuits, surge current should be considered.

3.Mechanical Life and Durability: Operating force (OF) determines trigger sensitivity, with a common range of 50gf to 400gf. Pre-stroke (PT) and over-stroke (OT) affect installation tolerances and lifespan; a higher OT provides stronger shock resistance but may shorten the lifespan.

4.Operating Temperature Range: Choose according to the triggering method: straight rod type for linear pressing; roller lever type for rotary cam triggering; long rod type for large displacement detection; wire type for flexible triggering scenarios.

5.Dimensions and Actuation Type: The standard product operating temperature is -40℃ to +85℃. Special versions are required for extreme low or high temperature environments. Special selection of contact materials and lubricants is needed for low-temperature environments.

6.Certifications and Quality: PCB pins are suitable for circuit board soldering; quick-connect terminals facilitate field installation; wired terminals offer higher protection levels; bracket mounting allows for flexible adjustment of the triggering position.

Taking the G304A150-E27D49-AEAB-280U sealed subminiature micro switch as an example, we will demonstrate how to select the appropriate model:

Switch Type Determination:Based on the project requirements for an subminiature sealed microswitch, the G304A series was selected.

Trigger Specification (150):The drawing indicates an operating force of 150gf, representing a moderately stable spring design. Select the corresponding operating force according to project requirements. If the required operating force is not listed in the specifications, please contact us to confirm if it meets your needs.

Erminal Structure (E27):TDifferent terminal and handle types are selected according to project requirements. E represents a T-type PCB terminal, and 27 represents a straight lever handle.

Circuit and Internal Structure (D):The internal circuit type of the switch needs to be confirmed. D represents an SPDT non-short-circuit circuit. This step determines the internal structure of the drawing.

Confirm Positioning Post Type (49A):Positioning posts help secure the switch to the equipment. 49 indicates no positioning post (select a suitable post based on your needs), and A indicates the position of the positioning post on the switch.

Confirm Wiring Type (EAB280):Skip this step if your switch doesn't require a wire. Here you need to confirm the wire type, material, and direction. 280 represents the wire length; contact Unionwell for customization.

Confirm Version Identifier (U):Used to distinguish between Unionwell standard engineering versions and OEM project versions. The switch will display the official Unionwell logo.

Complete G304 Technical Documentation(PDF)

Application Scenarios

Waterproof limit switches are widely used in many industries

New Energy Vehicles
- ●Production line position detection
- ●Safety door interlocks
- ●Robot joint limit switches
- ●AGV positioning
- ●Lifting platform limit switches
- ●Packaging equipment detection
Smart Home & Appliances
- ●Medical pump and valve control
- ●Diagnostic equipment positioning
- ●Surgical instrument limit switches
- ●Wheelchair control switches
- ●Infusion pump detection
- ●Detection door limit switches
- ●Electronic locks for charging guns
- ●Door lock mechanisms
- ●Seat adjustment switches
- ●Trunk locks
- ●Sunroof control systems
- ●HVAC damper actuators
- ●Battery management systems
Industrial Automation
- ●Smart door locks
- ●Washing machine door switches
- ●Dishwasher water level detection
- ●Microwave oven door interlocks
- ●Range hood lifting control
- ●Smart toilet lid detection
Medical Equipment

HonorOUR Certification

2024: Won the ISO5001

2024: Won the Ecovadis

2023: Won the ISO14001

2023: Won the Specialized and New Certificate

2022: Won the Provincial Engineering Center Enterprise

2022: Won the UL Witness Laboratory

2016: Won the IATF16949

2016: Won the ISO45001

2015: Won the ISO9001

2014: High-tech Enterprise Certificate

why choose Unionwell

Unionwell is a professional micro switch manufacturer in Huizhou, Guangdong with 30 years of manufacturing experience, specializing in the production of waterproof micro switches, automotive micro switches and other types of micro switches. It covers an area of more than 65,000 square meters, has obtained CE certification from many countries around the world, introduced advanced equipment in the industry, and has a professional R&D team!

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

Complete product range

Unionwell offers a complete product range covering waterproof, dustproof, ultra-miniature, and high-precision micro switches, ensuring fast adaptation to diverse applications across automotive, home appliances, and industrial automation.
3

Super competitive price

Unionwell provides super competitive pricing backed by in-house tooling and automated production, helping you reduce costs while maintaining high quality and reliable supply for large-volume projects.

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FAQ

What does IP67 protection rating mean for a waterproof micro switch?

IP67 protection rating has two meanings: Level 6 dustproof means completely preventing dust ingress; dust cannot penetrate the switch's interior. Level 7 waterproof means the switch can be briefly submerged in 1 meter of water for 30 minutes at normal temperature and pressure without affecting normal operation. Unionwell's IP67 waterproof switches have all passed rigorous immersion tests and can be used in harsh environments such as high humidity, dust, and rain.

How to choose a suitable waterproof micro switch?

Consider six main aspects: 1) Protection rating (IP65/IP67/IP68); 2) Electrical parameters (voltage, current, AC/DC); 3) Operating force and stroke; 4) Actuator type (straight rod/roller lever/long rod, etc.); 5) Operating temperature range; 6) Installation and wiring method. Unionwell's technical team can provide free selection guidance; please contact us for consultation.

What certifications do your waterproof micro switches have?

Unionwell waterproof micro switches have passed numerous international authoritative certifications, including UL, cUL, ENEC, IATF16949, ISO9001, and ISO14001. Automotive-grade products also meet the specific reliability requirements of the automotive industry. Certificate copies of all certifications are available for customer verification.

Do you support OEM/ODM customization? What is the minimum order quantity?

We support full-process OEM/ODM customization services, including housing materials, operating head type, terminal type, wire length, operating force parameters, protection level, etc., all of which can be customized according to customer needs. The MOQ for standard products is 1000pcs, while the MOQ for customized products varies from 500 to 2000pcs depending on the complexity. Please contact our sales team for a specific assessment.

What is the lifespan of the waterproof microswitches?

The lifespan depends on the load type, operating frequency, and environmental conditions. Under rated load, the mechanical life can reach over 1 million cycles, and the electrical life can reach over 100,000 cycles. The electrical life can be significantly extended under light load (signal level) applications. For specific model lifespan data, please refer to the corresponding product specification sheet.

What is the typical lead time?

Standard and routine products are in ample stock. Samples can be shipped within 3-5 business days, and bulk orders have a lead time of 2-3 weeks. Customized products typically have a lead time of 4-8 weeks, depending on development complexity. We have multiple warehouses worldwide and can provide VMI inventory management services for core clients.

What temperature environment can waterproof micro switches operate in?

The standard waterproof micro switch operates in a temperature range of -40℃ to +85℃, and its storage temperature range is -40℃ to +125℃. Special low-temperature products can operate at -55℃, and high-temperature products can operate at +125℃. For applications in extreme temperature environments, please confirm the selection with our technical department in advance.

How to test the performance of waterproof micro switches?

Routine testing includes:
1.Continuity testing (contact resistance, insulation resistance, withstand voltage);
2.Mechanical performance testing (operating force, release force, stroke, operating characteristics);
3.Environmental reliability testing (high and low temperature cycling, damp heat cycling, salt spray, vibration and shock);
4.Life testing (mechanical life, electrical life).
Unionwell laboratories can provide a full range of testing services.

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