Omron E2S-W21 1M Proximity Sensor
Omron E2S-W21 1M is a compact square, unshielded proximity sensor with a 2.5 mm sensing distance and a 0 to 1.9 mm setting distance. It uses a DC 2-wire NO output and a pre-wired 1 m cable, with a 12 to 24 VDC supply. Ferrous metal is the specified detectable object, and the standard sensing object is iron measuring 15 × 15 × 1 mm. Response frequency is 1 kHz minimum, leakage current is 0.8 mA max., control-output load current is 3 to 50 mA max., and differential travel is 10% max. An orange operation indicator and IP67 protection are specified. The E2S-W21 belongs to the Proximity sensor portfolio from Omron sensing products.
| Brand | Omron |
| Product | Proximity Sensors |
| Model Number | E2S-W21 1M |
Omron E2S-W21 1M 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 1 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 1M Proximity Sensor uses a compact square, unshielded sensing format with a 2.5 mm sensing distance and a 0 to 1.9 mm setting distance. Its output is DC 2-wire with NO operation, and the connection is a pre-wired 1 m cable. The power-supply range is 12 to 24 VDC. Ferrous metal is the specified detectable object, while the standard target is iron measuring 15 × 15 × 1 mm. Differential travel is 10% max. of sensing distance, leakage current is 0.8 mA max., and response frequency is 1 kHz minimum. Control-output load current ranges from 3 to 50 mA max., and an orange indicator displays operation.
The protection circuit contains output short-circuit protection and a surge suppressor. Operating temperature is -25 to 70°C and storage temperature is -40 to 85°C without icing or condensation. Operating humidity is 35% to 90%, with storage humidity from 35% to 95% without condensation. Polyarylate resin is specified for the case, and degree of protection is IP67. The W21 1M is therefore defined by its compact square body, 2.5 mm sensing distance, DC 2-wire NO output, and 1 m cable. The same W21 configuration with a longer pre-wired cable is available as E2S-W21 5M.
