Omron WLD18-N Limit Switch
Omron WLD18-N is a WL Series limit switch with a sealed top plunger, screw terminals, and a G½ conduit. Maximum pretravel is 1.7 mm, and this version is specified without an operation indicator. IP67 protection, 25 mΩ maximum initial contact resistance, and 100 MΩ minimum insulation resistance at 500 VDC are listed. The WLD18-N Sealed Top Plunger Switch belongs to the WL Series within the Omron Sealed Plunger Switch Range from Omron Industrial Switching Components. Its sealed top plunger, G½ screw terminals, 1.7 mm maximum pretravel, no-indicator configuration, and IP67 protection provide the main model identity.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | WLD18-N |
Omron WLD18-N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Terminal Shape | Screw terminals (Conduit size: G½) |
| Pretravel Pt | 1.7 mm max. |
| Indicator | Without operation indicator |
| Ambient Temperature | -10 to +80°C (with no icing) |
| Ambient Humidity | 35 to 95%RH |
| Shock Resistance | Destruction: 1,000 m/s2 min. Malfunction: 300 m/s2 min. |
| Degree Of Protection | IP67 |
| Insulation Resistance | 100 MΩ min. (at 500 VDC) |
| Actuator | Sealed top plunger |
| Vibration Resistance | Malfunction: 10 to 55 Hz, 1.5-mm double amplitude |
| Contact Resistance | 25 mΩ max. (initial value for the built-in switch) |
| Rated Frequency | 50/60 Hz |
The Omron WLD18-N Limit Switch uses a sealed top plunger with screw terminals and a G½ conduit. Maximum pretravel is 1.7 mm, and this version is specified without an operation indicator. Initial contact resistance is 25 mΩ maximum, while insulation resistance is 100 MΩ minimum at 500 VDC. IP67 protection is listed, with frequency specified at 50/60 Hz. The operating temperature range is -10 to 80°C with no icing, and relative humidity is 35 to 95%. These values provide the core electrical, connection, and environmental profile around the sealed top-plunger actuator.
Malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. Destructive shock resistance is 1,000 m/s² minimum and malfunction shock resistance is 300 m/s² minimum. The strongest exact-model terms are WL Series, sealed top plunger, G½ screw terminals, 1.7 mm maximum pretravel, no operation indicator, 25 mΩ initial contact resistance, 100 MΩ insulation resistance, and IP67 protection. The source does not provide a contact form, rated load, operation mechanism, operating speed, or durability value, so those details are not inferred from other WL models. Keeping those fields separate avoids mixing specifications from indicator-equipped WLD variants into WLD18-N. For a related WL Series sealed top-roller-plunger model with an LED indicator, see WLD28-LD-N.
