Maintenance teams planning replacements for E2S-W21-2M frequently review Omron SMPS 24V 10A, Proximity Sensor M18 Pnp No and IFM Proximity Sensor to prevent downtime, checking availability and compatibility with existing systems.
Omron E2S-W21 2M Proximity Sensor
The Omron E2S-W21 2M Proximity Sensor offers Compact Square Type, Unshielded, 2.5 mm Sensing distance, DC 2-Wire NO, Pre-wired 2 M Cable , 12 to 24 VDC Power supply voltage, IP67 Protection. Manufactured by Omron under the Omron Proximity Sensors category, this model belongs to the Omron E2S Series.

| Brand | Omron |
| Product Type | Proximity Sensor |
| Model Number | E2S-W21 2M |
Omron E2S-W21 2M Proximity Sensor - Technical Specifications
| Specification | Value |
|---|---|
| Type | Compact Square Type |
| Sensing Distance | 2.5 mm |
| Set distance | 0 to 1.9 mm |
| Mounting type | Unshielded |
| Output Configuration | DC 2-Wire |
| Operation mode | NO |
| Connection Method | Pre-wired 2 M Cable |
| Standard Sensing Object | Iron, 15 Γ 15 Γ 1 mm |
| Response Frequency | 1 kHz min. |
| Differential Travel | 10% max. of sensing distance |
| Detectable Object | Ferrous metal |
| Power Supply Voltage | 12 to 24 VDC |
| Current Consumption | 0.8 mA max. |
| Protection Circuit | Output short-circuit protection, Surge suppressor |
| Ambient Temperature Range | Operating: β25 to 70Β°C , Storage: β40 to 85Β°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35% to 90% , Storage: 35% to 95% (with no condensation) |
| Degree of Protection | IP67 |
| Control Output | 3 to 50 mA max. |
| Indicators | Operation indicator (orange) |
| Materials | Polyarylate resin |
| Weight | Approx. 10 g |
The Omron E2S-W21 2M is typically considered together with other sensors in the E2S Super-compact Proximity Sensor family because they follow similar mounting patterns, supply ranges, and adjustment behaviour. In practice, engineers often review related models such as Omron E2S-Q21 5M (Compact Square Type, 2.5 mm sensing, Unshielded, DC 2-Wire, NO, Pre-wired 5 M Cable), Omron E2S-W21 1M (Compact Square Type, 2.5 mm sensing, Unshielded, DC 2-Wire, NO, Pre-wired 1 M Cable), and Omron E2S-Q21 1M (Compact Square Type, 2.5 mm sensing, Unshielded, DC 2-Wire, NO, Pre-wired 1 M Cable) when selecting the most suitable variant for a tank, chute, conveyor, or compact fixture location. Comparing type, usable sensing distance, mounting style, output configuration, switching mode, and connection method helps match each sensor to the available mechanical space and wiring layout. The E2S-W21 2M fits naturally into panels, machine frames, dosing systems, and process equipment where a robust Omron Super-compact Proximity Sensor is required for repeatable switching in industrial environments.




