Omron E3T-ST31 5M Ultracompact Through-Beam Photoelectric Sensor
The E3T-ST31 5M Photoelectric Sensor is an ultracompact through-beam model with 2 m sensing distance, NPN output, and red LED light source operating on 12 to 24 VDC. Designed as an Ultracompact, Ultrathin Photoelectric Sensor with Built-in Amplifier, it supports precise detection in confined spaces using Light-ON operation. Manufactured by Omron, this sensor is part of the Omron Photoelectric Sensors range within the Omron E3T Series.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3T-ST31 5M |
Omron E3T-ST31 5M Photoelectric Sensor - Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Shape | Square type |
| Sensing Distance | 2m |
| Power Supply Voltage | 12 to 24 VDC |
| Output Configuration | NPN |
| Connection Method | Pre-wired cable length 5m |
| Current Consumption | 30 mA max. (Emitter 10 mA max., Receiver 20 mA max.) |
| Light Source (Wavelength) | Red LED |
| Operation Mode | Light-ON |
| Response Time | 1 ms max. |
| Degree Of Protection | IP67 |
| Material | Polybutylene terephthalate |
| Material Lens | Denatured Polyarylate |
| Weight | 40g |
The Omron E3T-ST31 5M is a square-type through-beam photoelectric sensor designed for stable object detection in industrial automation systems. As an Ultrathin Photoelectric Sensor with Built-in Amplifier, it combines 2 m sensing distance, NPN output, and a compact M2-mounting structure for space-limited installations. The integrated amplifier ensures consistent signal processing without external control units.
This Through-beam, M2-mounting Sensor is widely used in electronics assembly, small-part conveyors, packaging equipment, and inspection stations. Its focused red LED light source supports reliable detection of small components, while the pre-wired 5 m cable simplifies installation in control panels and machine frames requiring flexible routing.
The E3T-ST31 5M supports long-term industrial operation through stable voltage tolerance, noise-resistant output behavior, and a slim mechanical profile. As part of the E3T Series, it aligns with standardized photoelectric sensing practices and compact automation designs. Engineers selecting ultracompact photoelectric sensors value this model for consistent detection performance, simple mounting, and dependable operation in dense machine layouts.
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