Omron E2S-W21 5M Proximity Sensor
Omron E2S-W21 5M is a compact square proximity sensor rated for a 2.5 mm sensing distance, with a usable setting distance of 0 to 1.9 mm. Its electrical configuration uses a DC 2-wire NO output and a pre-wired 5 m cable. The supplied specifications list ferrous metal as the detectable object and iron 15 × 15 × 1 mm as the standard sensing object. Response frequency is 1 kHz minimum, current consumption is 0.8 mA max., and control-output load current is 3 to 50 mA max. The specification also includes an orange operation indicator, output short-circuit protection, a surge suppressor, and IP67 protection. The E2S-W21 sits in the Proximity sensor category from Omron industrial sensing products.
| Brand | Omron |
| Product | Proximity Sensors |
| Model Number | E2S-W21 5M |
Omron E2S-W21 5M Proximity Sensor - Technical Specifications
| Specification | Value |
|---|---|
| Sensor | Compact Square Type |
| Sensing Distance | 2.5 mm |
| Setting Distance | 0 to 1.9 mm |
| Output Configuration | DC 2-Wire |
| Operation Mode | NO |
| Connection | Pre-wired 5 M Cable |
| Differential Travel | 10% max. of sensing distance |
| Detectable Object | Ferrous metal |
| Standard Sensing Object | Iron, 15 × 15 × 1 mm |
| Response Frequency | 1 kHz min. |
| Current Consumption | 0.8 mA max. |
| Control Output Load Current | 3 to 50 mA max. |
| Indicator | Operation indicator (orange) |
| Protection Circuit | Output short-circuit protection, Surge suppressor |
| Ambient Temperature Range | Operating: −25 to 70°C , Storage: −40 to 85°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35% to 90% , Storage: 35% to 95% (with no condensation) |
| Material | Polyarylate resin |
| Degree Of Protection | IP67 |
| Weight | Approx. 10 g |
The Omron E2S-W21 5M Proximity Sensor combines a compact square body with a 2.5 mm sensing distance and a 0 to 1.9 mm setting range. It is configured as a DC 2-wire sensor with NO operation and uses a pre-wired 5 m cable. The specified detectable object is ferrous metal, while the standard target is iron measuring 15 × 15 × 1 mm. Differential travel is limited to 10% max. of the sensing distance. Electrical performance includes a 1 kHz minimum response frequency, 0.8 mA max. current consumption, and a 3 to 50 mA max. control-output load current. Operating status is shown by an orange indicator.
The protection circuit consists of output short-circuit protection and a surge suppressor. Operating temperature is specified from -25 to 70°C, with storage from -40 to 85°C and no icing or condensation. The humidity range is 35% to 90% during operation and 35% to 95% in storage without condensation. Polyarylate resin is listed for the case material, and the model carries an IP67 degree of protection. This combination identifies the W21 5M as an E2S compact square proximity sensor with DC 2-wire NO switching and a 5 m cable. A closely matched W21 version using a shorter cable is the E2S-W21 2M.
