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IP67 and IP68 are widely used protection ratings for switches installed on exposed equipment panels. This guide explains what the ratings mean, what they do not mean, and what manufacturers should confirm before selecting a sealed switch.
Switches used on construction equipment, agricultural machinery, marine systems, special vehicles, and outdoor control panels are often exposed to water, dust, mud, cleaning processes, and changing weather conditions.
For these applications, buyers frequently compare IP67 and IP68 switches.
However, choosing between the two ratings requires more than selecting the higher number. The protected area, installation method, test conditions, and rear wiring structure are equally important.
What Does an IP Rating Mean?
IP stands for Ingress Protection.
The rating uses two digits.
The first digit describes protection against solid objects and dust.
The second digit describes protection against water.
For both IP67 and IP68:
• The first digit 6 indicates a dust-tight level of protection.
• The second digit describes the water protection level.
The rating applies only under the specified test and installation conditions.
What Does IP67 Mean?
IP67 generally indicates protection against dust and temporary water immersion under defined test conditions.
For a panel-mounted switch, the rating may apply only to the portion exposed above the mounting panel.
This means the lever, actuator, bushing, button, sealing washer, and panel interface may be protected, while the terminals or rear body may remain exposed.
IP67 can be suitable for equipment that may experience:
• Rain
• Water spray
• Dust
• Mud
• Outdoor exposure
• Temporary immersion
• Cleaning procedures
The exact suitability still depends on how and where the switch is installed.
What Does IP68 Mean?
IP68 also indicates dust-tight protection, but it is intended for water immersion conditions beyond the IP67 test level.
The important point is that IP68 does not have one universal depth and duration for every product.
The manufacturer should specify the test conditions.
These may include:
• Water depth
• Test duration
• Water temperature
• Static or dynamic water conditions
• Protected part of the switch
• Mounting method
For TOOWEI products where IP68 is specified, the exact series conditions should be confirmed from the product specification.
For example, some front-panel switch designs may be tested at a defined water depth and duration while mounted correctly to a panel.
IP68 Is Not Automatically Better for Every Application
A higher IP rating does not automatically make a switch the correct choice.
A product may have IP68 front-panel sealing but exposed rear terminals.
Another product may have IP67 front-panel sealing combined with potted wire leads that provide better protection behind the panel.
The correct product depends on where water and contaminants can reach the switch.
Equipment manufacturers should ask:
• Is only the front of the panel exposed?
• Can water enter behind the panel?
• Will the equipment be pressure washed?
• Is temporary immersion possible?
• Is continuous immersion expected?
• Are the terminals protected by an enclosure?
• Is the switch installed vertically or horizontally?
Front-Panel Sealing Explained
Front-panel sealing means the protection applies to the area above the mounting panel when the switch is correctly installed.
This usually depends on:
• A sealing washer or O-ring
• Correct mounting-hole dimensions
• A flat panel surface
• Proper nut tightening
• Correct product orientation
• Suitable panel thickness
The wording should be precise.
Recommended expressions include:
• IP67 front-panel sealing
• IP68 protection for front-panel components
• Sealed above the mounting panel
These are more accurate than simply describing the complete switch as waterproof.
Fully Sealed and Potted-Wire Structures
A fully sealed switch provides additional protection around the rear body, terminals, or wire exit.
One common method is a potted-wire structure.
The rear section is sealed with resin or another sealing material, and wires exit directly from the switch body.
This can reduce exposure around the terminal area and simplify customer assembly.
Potted-wire versions may be useful for:
• Open vehicle panels
• Outdoor machinery
• Marine equipment
• Agricultural equipment
• Exposed control boxes
• Washdown environments
However, the cable connection and connector at the other end must also be protected.
A sealed switch with an unsealed connector does not create a fully sealed electrical system.
Installation Quality Affects Protection
Even a correctly rated switch can leak if it is installed incorrectly.
Common causes include:
• Oversized mounting holes
• Damaged sealing washers
• Uneven panel surfaces
• Insufficient tightening
• Excessive tightening
• Incorrect washer position
• Paint buildup around the hole
• Panel deformation
• Incorrect installation orientation
The mounting instructions should be followed during production.
For OEM projects, sealing should be verified on the actual panel rather than only on a laboratory sample.
Water Protection Does Not Cover Every Environmental Risk
An IP rating focuses on solid-particle and water ingress.
It does not automatically prove resistance to:
• Salt spray
• Fuel
• Hydraulic oil
• Cleaning chemicals
• UV exposure
• Extreme temperature
• Continuous vibration
• Corrosion
• Impact
• Steam cleaning
If the equipment operates in a marine, mining, agricultural, or chemical environment, additional material and application testing may be required.
Switch Materials Still Matter
The sealing level is only one part of environmental durability.
Buyers should also review:
• Housing material
• Lever or button material
• Nut material
• Contact material
• Sealing material
• Surface finish
• Wire insulation
• Connector construction
For example, stainless steel external parts may provide better corrosion resistance than standard plated components in some environments.
However, “metal housing” and “stainless steel housing” should not be treated as identical descriptions.
IP Ratings and Electrical Safety
An IP rating does not indicate the switch’s electrical load capacity, insulation performance, contact life, or suitability for a particular circuit.
A switch must still be selected according to:
• Rated current
• Rated voltage
• AC or DC load
• Contact configuration
• Mechanical life
• Electrical life
• Dielectric strength
• Insulation resistance
Environmental protection and electrical performance should be evaluated separately.
When to Choose IP67
IP67 may be appropriate when:
• The switch is installed on a protected equipment panel
• The front surface is exposed to dust and rain
• Temporary water exposure is possible
• The rear terminals remain inside an enclosure
• Full immersion is not a normal operating condition
• The application does not require the specified IP68 test level
When to Choose IP68
IP68 may be appropriate when:
• More demanding immersion protection is required
• The application specification specifically requires IP68
• The equipment may be exposed to deeper or longer water contact
• The manufacturer’s IP68 test conditions match the application
• The mounting and rear wiring design support the required protection
Questions to Ask the Supplier
Before approving a sealed switch, confirm:
1.Does the rating apply to the front panel or the complete switch?
2.What are the IP68 test depth and duration?
3.Is the rear terminal area sealed?
4.Is a washer or O-ring included?
5.What panel thickness is recommended?
6.Is a specific mounting torque required?
7.Are wire leads or connectors available?
8.Are the materials suitable for the operating environment?
9.Has the product been tested in the intended orientation?
10.Does the application require additional chemical or vibration testing?
Conclusion
IP67 and IP68 are useful ratings, but they should not be used as the only selection criteria.
The correct sealed switch depends on the protected area, test conditions, installation method, rear wiring, materials, and actual equipment environment.
A clear description such as “IP67 front-panel sealing” is often more valuable than a broad waterproof claim.
TOOWEI offers sealed toggle switches, push button switches, and panel indicator lights for equipment panels, vehicles, machinery, and outdoor control applications.
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