Omron D4ER-@N Limit Switches Oil Resistant

Omron D4ER-@N Limit Switches use high-frequency oscillation. They resist heat, chemicals, and water better than Rectangular Sensors. They are available in both shielded and unshielded models.

Proximity Sensors are available in models using high-frequency oscillation to detect ferrous and non-ferrous metal objects and in capacitive models to detect non-metal objects. Models are available with environment resistance, heat resistance, resistance to chemicals, and resistance to water.

Omron D4ER-@N Limit Switches Features and Benefits

  • Material combining HNBR and fluoro rubber used for superior resistance to
  • Prevents ingress of cutting oil from moving sections.
  • Fluororesin cable that withstands cutting oils is provided as
  • Models available with Smart click connectors for easy connection.
  • Minute load model with gold cladding is optimal for electronic
  • Approved by EN (TÜV).
  • Same mounting pitch as D4E-N
  • IP67G degree of protection (JIS C 0920 Annex 1).


Degree of protection IP67 (IEC 60529) and IP67G (JIS C 0920 Annex 1) *1
Passed OMRON’s Oil-resistant Component Evaluation Standards *2 (Cutting oil type: specified in JIS K 2241:2000; Temperature: 35°C max.)
Durability Mechanical 4,000,000 operations min.
Electrical 500,000 operations min. (Standard load: 1 A at 30 VDC, resistive load/Micro load: 0.1 A at 30 VDC, resistive load) 4,000,000 operations min. (10 mA at 24 VDC, resistive load)
Operating speed 0.1 mm/sec to 0.5 m/sec
Operating frequency Mechanical: 120 operations/min
Electrical: 30 operations/min
Insulation resistance 100 MÙ min. (at 500 VDC) *3
Contact resistance Standard load : D4ER-1@@@N@: 15 mÙ max. (initial value for the built-in switch when tested alone) Micro load       : D4ER-2@@@N@: 50 mÙ max. (initial value for the built-in switch when tested alone)
Dielectric strength Between terminals of the same polarity 1,000 VAC, 50/60 Hz for 1 min
Between each terminal and non-current-carrying metal part 1,500 VAC, 50/60 Hz for 1 min/Uimp at 2.5 kV (EN 60947-5-1)
Rated insulation voltage (Ui) 250 V
Pollution degree (operating environment) 3 (EN 60947-5-1)
Short-circuit protective device (SCPD) 10 A fuse (type gG or type gI, IEC 60269 approved)
Conditional short-circuit current 100 A (EN 60947-5-1)
Conventional enclosed thermal current (Ithe) 5 A (EN 60947-5-1)
Protection against electric shock Class II (grounding not required with double insulation)
Vibration resistance Malfunction 10 to 55 Hz, 1.5-mm double amplitude
Shock resistance Destruction 1,000 m/s2 max. (IEC 68-2-27)
Malfunction 300 m/s2 max. (IEC 68-2-27)
Ambient operating temperature/Ambient storage temperature 5°C to 70°C (with no icing or condensation)
Ambient operating humidity 35% to 95%RH (with no condensation) (in case of roller plunger)
Weight Cable type (2 m): Approx. 140 g
Pre-wired Connector type: Approx. 103 g


  1. The following values are initial values.
  2. The following ratings may vary depending on the model. Contact your OMRON representative for further
  3. The IP67G is the degree of protection that is defined according to the JIS (Japanese Industrial Standards).
  4. The IP67 indicates the same level of protection as defined by the IEC, and the G indicates that a device has resistance to oil.
  5. The Oil-resistant Component Evaluation Standards are OMRON’s own durability evaluation standards.

The Pre-wired Connector type meets the degree of protection when it is correctly connected with an XS5@R Oil-resistant Connector. The degree of protection is not satisfied with the part where there is no XS5FR Oil-resistant Connector connected and cable wires are uncovered. And as for the Cable type, the degree of protection is not satisfied with the part where cable wires are uncovered.

*This value represents the condition when the Switch is shipped from the factory.

Download Catalog: Environment-resistant Series


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