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| Place of Origin | japan |
| Brand Name | OMRON |
| Certification | CE ROHS |
| Model Number | E2E-X3D1 |
Part Number: E2E-X3D1
Manufacturer: Omron (Japan)
Product Type: Inductive Proximity Sensor — M12 Shielded
Stepping from M8 to M12 brings two practical advantages. The larger sensing face generates a stronger electromagnetic field, which is why the M12 E2E-X3D1 achieves 3mm sensing distance while a shielded M8 variant of the same type reaches only 2mm. The extra clearance matters in real installations where thermal expansion, mechanism wear, and mounting tolerances all act simultaneously to shift the effective gap over the machine's operating cycle.
The M12 thread also provides more mounting stability. In high-vibration environments — rotating tables, presses, conveyor drives — the larger lock nut torque capacity keeps the sensor in position where M8 mountings can gradually rotate loose under continuous vibration loading.
The 0–2.4mm setting range provides the working zone for reliable, stable switching. The green LED tells you directly whether the target is within this range — no multimeter needed during commissioning. The sensor is within spec when both LEDs are active together: red indicating detection, green confirming the gap is correct.
The E2E-X3D1 designates the sensing specification. Connection variants serve different machine wiring standards without any difference in sensing performance:
| Parameter | Value |
|---|---|
| Sensing Distance | 3 mm (±10%) |
| Setting Distance | 0–2.4 mm |
| Output | DC 2-wire NO, polarised |
| Supply | 12–24V DC |
| Switching | 3–100 mA |
| Leakage | 0.8 mA max |
| Response | 1 kHz |
| Housing | M12 × 1mm, nickel-plated brass |
| IP | IP67 + oil-proof |
| Indicators | Red (output) + Green (setting range) |
Q1: What is the practical difference between E2E-X3D1 (M12) and E2E-X2D1 (M8)?
Sensing distance: 3mm (M12) vs 2mm (M8). Response frequency: 1kHz (M12) vs 1.5kHz (M8). Housing: M12 is more stable in high-vibration environments. The M12 also carries dual LED indicators. Choose M8 for tight installation spaces; choose M12 for greater sensing clearance, better mounting stability, or detecting larger targets.
Q2: The setting distance is 0–2.4mm on a 3mm rated sensor — why is the setting range less than the nominal sensing distance?
The 3mm nominal sensing distance is the laboratory characterised figure for the standard test target under controlled conditions. The 0–2.4mm setting range (approximately 80% of nominal) is the practical working zone that absorbs real-world variation: manufacturing tolerance (±10%), temperature effects (±10% over −25°C to +70°C), voltage variation, and target surface differences. Setting within this range ensures reliable switching across all operating conditions simultaneously.
Q3: The actual target is stainless steel 316, not iron. What effective sensing distance should be expected?
Austenitic stainless steel (304/316) has a correction factor of approximately 0.6–0.75× for shielded E2E sensors. For the E2E-X3D1, this gives an effective sensing distance of approximately 1.8–2.25mm for a 316 stainless target of comparable size. Set the installation gap within this calculated effective range and verify the actual switching point before finalising the mechanical mounting.
Q4: Can two E2E-X3D1 sensors be mounted adjacent to each other without mutual interference?
Mutual interference is possible when two sensors' sensing fields overlap — typically when mounted side by side at close spacing or face-to-face. Omron specifies a minimum side-by-side separation of approximately 30–40mm between sensor faces for standard-frequency M12 E2E variants. For closer installation, the E2E-X3D15 series uses different oscillation frequencies between adjacent sensors.
Q5: The red LED is off even though the PLC input reads ON. What does this indicate?
The red LED mirrors the sensor's output switching state. If the PLC reads ON but the red LED is off, the input signal may be coming from elsewhere — check for wiring shorts or another sensor on the same PLC input. If both LED and PLC are reading unexpectedly, check the supply voltage at the sensor (should be 10–30V DC) and verify the target is within the 0–2.4mm setting range when the green LED indicator is also checked.
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