OMRON E2A-S18KN16-M1-B1 — Non-Flush Cylindrical Inductive Sensors
Omron E2A-S18KN16-M1-B1: Inductive proximity sensor, M18, non-flush, Sn 16 mm, PNP NO output, M12 connector, 4-pin.
Status: In production
Brand: Omron
Product: Inductive proximity sensor, M18, non-flush
Rated sensing distance (Sn): 16 mm
Output: PNP, NO
Connection: M12 connector, 4-pin
Power supply voltage: 12 to 24 V DC
Degree of protection: IP67, IP69K
The Omron E2A-S18KN16-M1-B1 is an E2A-S inductive proximity sensor with an M18 short body in stainless steel (SUS 303); Omron created and tested the series for harsh environments and heavy vibration. This non-flush (unshielded) sensor has a rated sensing distance (Sn) of 16 mm ±10% and a setting distance of 0 to 12.8 mm. The unshielded sensing head protrudes 10 mm from the thread. Standard sensing object: 48 × 48 × 1 mm mild steel (ST37); average response frequency: 400 Hz; differential travel: at most 10% of the sensing distance.
Supply voltage is 12 to 24 V DC (operating range 10 to 32 V DC) and current consumption 10 mA max. The PNP open-collector NO output switches up to 200 mA with a residual voltage of 2 V max. Reverse polarity, surge and short-circuit protection are included. Connection is via a 4-pin M12 connector; the yellow indicator is arranged 4 × 90°. The sensor is rated IP67 and IP69K, operates from −40 to 70 °C and withstands 1,000 m/s² shocks. Overall length 53 mm, thread length 29 mm, torque 70 N·m, packaged weight approximately 70 g.
Omron E2A-S18KN16-M1-B1 technical specifications
| General | |
|---|---|
| Housing size | M18 |
| Mounting type | Non-flush (unshielded) |
| Body type | Short body |
| Detection | |
| Rated sensing distance (Sn) | 16 mm ±10% |
| Setting distance | 0 to 12.8 mm |
| Differential travel | 10% max. of sensing distance |
| Detectable object | Ferrous metal (the sensing distance decreases with non-ferrous metal) |
| Standard sensing object | Mild steel ST37, 48 × 48 × 1 mm |
| Response frequency | 400 Hz (average value) |
| Electrical characteristics | |
| Power supply voltage | 12 to 24 V DC (operating range 10 to 32 V DC), ripple 10% max. (peak-to-peak) |
| Current consumption | 10 mA max. |
| Protection circuits | Output reverse polarity protection, power supply reverse polarity protection, surge suppressor, short-circuit protection |
| Outputs and indicators | |
| Output type | PNP open collector, NO (normally open) |
| Load current | 200 mA max. (32 V DC max.) |
| Residual voltage | 2 V max. (at 200 mA load current with 2 m cable) |
| Indicator | Operation indicator (yellow LED, 4 × 90°) |
| Environmental | |
| Operating / storage temperature | Operating: −40 to 70 °C (with no icing or condensation); storage: −40 to 85 °C |
| Ambient humidity | 35% to 95% (operating and storage) |
| Degree of protection | IP67 (IEC 60529), IP69K (DIN 40050) |
| Vibration resistance | 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y and Z directions |
| Shock resistance | 1,000 m/s², 10 times each in X, Y and Z directions |
| Mechanical and connection | |
| Housing material | Stainless steel (SUS 303) |
| Sensing surface | PBT |
| Clamping nut | Stainless steel (SUS 303) |
| Connection | M12 connector, 4-pin (pin 2 not used on NO models) |
| Overall length | 53 mm |
| Thread length | 29 mm |
| Sensing head protrusion | 10 mm |
| Weight (packaged) | Approx. 70 g |
| Tightening torque | 70 N·m |
Key features
- M18 stainless steel (SUS 303) housing, non-flush (unshielded)
- Rated sensing distance 16 mm, response frequency 400 Hz
- IP67 and IP69K degree of protection
- Operating temperature −40 to 70 °C
- PNP open-collector NO output; load current up to 200 mA
- Reverse polarity, surge and short-circuit protection
E2A-S18KN16-M1-B1 ordering codes
| Part number | Description |
|---|---|
| E2A-S18KN16-M1-B1 | PNP, NO, M12 connector (4-pin), short body |
| E2A-S18KN16-WP-B1 2M | PNP, NO, 2 m PVC cable, short body |
| E2A-S18LN16-M1-B3 | PNP, NO+NC, M12 connector (4-pin), long body |
Other Omron Non-Flush Cylindrical Inductive Sensors
- OMRON E2B-M12KN05-M1-B1 — Inductive proximity sensor, M12, non-flush
- OMRON E2B-M18KN10-M1-B1 — Inductive proximity sensor, M18, non-flush
- OMRON E2B-M30KN20-M1-B1 — Inductive proximity sensor, M30, non-flush
- OMRON E2A-S08KN02-M1-B1 — Inductive proximity sensor, M8, non-flush
- OMRON E2A-S12KN08-M1-B1 — Inductive proximity sensor, M12, non-flush
Models from other brands: Non-Flush Cylindrical Inductive Sensors
Is this inductive sensor right for your application?
Share the metal target to be detected (material, size), the required sensing distance, the mounting type (flush / non-flush), ambient conditions (oil, coolant, washdown, temperature) and your PLC input (PNP/NPN, NO/NC); let’s select the right inductive sensor and connection cable together.
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All product specifications are subject to change without notice. Source: Omron Europe product page (https://industrial.omron.eu/en/products/E2A-S18KN16-M1-B1), E2A-S family page (https://industrial.omron.eu/en/products/e2a-s) and E2A-S (Cat. No. D123-E1-03, January 2025) datasheet (https://files.omron.eu/downloads/latest/datasheet/en/d123_e2a-s_-_inductive_proximity_sensor_with_stainless_steel_body_datasheet_en.pdf) (accessed 28 September 2026).