USD 63.92
Omron E3T-SL21 2M is a compact NPN limited-reflective photoelectric sensor with a 5 to 30 mm sensing range and 2 m cable.
The Omron E3T-SL21 2M is an ultracompact limited-reflective photoelectric sensor with a built-in amplifier, M2 mounting and a 2 m pre-wired cable. It uses a 650 nm red LED to detect a 50 × 50 mm white-paper target at 5 to 30 mm, with an NPN open-collector Light-ON output. The sensor operates from 12 to 24 VDC, has a 1 ms maximum response time and an IP67 enclosure rating. Omron listed the exact 2 m model as selling and standard-stock on 2026-10-05.
A compact limited-reflective sensor for close-range object detection with an NPN Light-ON output.
| Parameter | Value |
|---|---|
| Product type | Ultracompact limited-reflective photoelectric sensor |
| Sensing distance | 5 to 30 mm (50 × 50 mm white paper) |
| Minimum sensing object | 0.15 mm min. diameter at 10 mm sensing distance |
| Differential distance | 6 mm max. |
| Light source | Red LED, 650 nm |
| Supply voltage | 12 to 24 VDC ±10%; ripple 10% p-p max. |
| Current consumption | 20 mA max. |
| Control output | NPN open collector, 26.4 VDC max., 50 mA max. |
| Operation mode | Light-ON |
| Response time | 1 ms max. (operate and reset) |
| Protective circuits | Output short-circuit, output reverse-polarity and power-supply reverse-polarity protection |
| Protection rating | IEC 60529 IP67 |
| Operating temperature | -25 to +55°C, no icing or condensation |
| Connection | Pre-wired, 2 m cable |
| Mounting | M2; set screw M2 × 14 and nut supplied |
| Housing material | Polybutylene terephthalate (PBT) |
| Lens and indicator material | Modified polyarylate |
| Physical Weight (kg) | 0.020 (approx., packaged). |
| Dimensions L x W x H (cm) | See the Omron E3T-SL1□ dimension drawing; no consolidated L × W × H value is stated in the text data. |
| Supply status | Active; Omron listed E3T-SL21 2M as selling and standard-stock on 2026-10-05, with no stock shown in that status record. |
Engineering suggestions require suitability checks for your installation.
The limited-reflective range suits installations where the target can be positioned within 5 to 30 mm.
Use the specified white-paper reference target range as a selection baseline, then verify detection with the actual target and mounting geometry.
Omron specifies a minimum sensing object of 0.15 mm diameter at a 10 mm sensing distance.
Evaluate the target material, shape and alignment at the intended sensing point before final machine installation.
