A “waterproof” label alone does not define where a limit switch can be installed. Water spray, temporary immersion, oil, dust and washdown are different exposures. Start with the machine environment and verify the exact model rating and installation instructions.
Record the direction and duration of water contact, cleaning method, dust level, temperature and any oil or chemicals. Also note whether the switch sits inside a protected enclosure or directly on the machine. Ingress protection does not automatically cover chemical resistance, condensation or damage from repeated impact.
Read the model-specific IP rating and the conditions under which it applies. Protection may depend on the cable gland, connector, conduit entry, cover and mounting orientation. An unused entry or a damaged seal can defeat an otherwise suitable housing. Check how the cable exits and whether water can run along it toward the switch.
A roller lever can follow a moving cam; a plunger is suited to direct movement. Verify approach direction, travel, overtravel, operating force and target speed. The target should actuate the switch reliably without using the housing or actuator as a hard stop.
Use the actual voltage, current, contact configuration and load type to select the switch. A motor or solenoid load can have a different starting current from a resistive load. Environmental protection does not replace electrical rating checks.
Check mounting dimensions, cable protection, access for inspection and how seals will be checked after cleaning or service. For a replacement, compare the actuator position and mounting drawing as well as the IP rating.
Review the XURUI limit switch range and the general limit switch selection guide. Send the exposure conditions, target movement, circuit details and mounting drawing for a model-specific recommendation.
