Omron WLD18-LD-N Limit Switch
Omron WLD18-LD-N is a two-circuit limit switch with a sealed top plunger and LED operation indicator for direct mechanical position sensing. The straight plunger actuator suits machine stops, slides, and moving parts that approach from above, while screw terminals with a G½ conduit entry support practical field wiring. The built-in LED provides visible confirmation of switch status, and low-level switching capability supports signal circuits. IP67 protection suits industrial environments exposed to dust or moisture. The WLD18-LD-N belongs to the WL Series within the sealed plunger limit switch range from Omron machine automation products for precise position and end-point detection.
| Brand | Omron |
| Product | Limit Switch |
| Model Number | WLD18-LD-N |
Omron WLD18-LD-N Limit Switch – Technical Specifications
| Specification | Value |
|---|---|
| Terminal Shape | Screw terminals (Conduit size: G½) |
| Pretravel Pt | 1.7 mm max. |
| Minimum Applicable Load | 5 VDC 1 mA, resistive load, P level |
| Rated Voltage | 10 to 115 VAC/DC |
| Leakage Current Reference Value | Approx. 0.4 mA at 10 VAC/DC Approx. 0.5 mA at 115 VAC/DC |
| Indicator | LED (With 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-LD-N Limit Switch uses a sealed top plunger actuator for direct mechanical position detection where the moving target approaches the switch in a straight line. The model includes an LED operation indicator, giving technicians visual confirmation of switch status during setup, inspection, or troubleshooting. Screw terminals with a G½ conduit entry support field wiring, while microload operation is supported down to 5 VDC at 1 mA resistive load. Rated operating voltage extends from 10 to 115 VAC/DC, and the plunger pretravel is specified at 1.7 mm maximum. IP67 protection supports use around dust, water, and industrial machine environments.
WLD18-LD-N provides 100 MΩ minimum insulation resistance at 500 VDC and 25 mΩ maximum initial contact resistance for the built-in switch. Operating temperature ranges from -10 to 80°C with 35 to 95% relative humidity. Destructive shock resistance is at least 1,000 m/s², while malfunction shock resistance is at least 300 m/s². Malfunction vibration resistance covers 10 to 55 Hz at 1.5 mm double amplitude. The sealed plunger, LED indicator, microload capability, and screw-terminal connection make it suitable for direct machine position and end-point detection where visible status indication is useful. For a related WL model using a lever actuator with the same LED-based operating indication, see the WLCA32-43LD-N.
