Omron E3T-ST22M 5M Through-Beam Photoelectric Sensor
Omron E3T-ST22M 5M is an ultracompact through-beam photoelectric sensor using an M3-mounting format for target sensing across a 300 mm distance. Its red LED forms the optical path between the emitter and receiver, and the integrated amplifier evaluates the beam interruption caused by the target. An NPN output communicates the switching condition to compatible industrial control inputs, while Dark-ON operation defines the output behavior. The sensor operates from 12 to 24 VDC and includes a 5 m pre-wired cable for installations requiring additional wiring length. Current consumption is 30 mA maximum, including 10 mA maximum for the emitter and 20 mA maximum for the receiver. Within the E3T Series, the E3T-ST22M 5M provides the extended-cable Dark-ON version. Related compact Dark-ON sensors are available across Omron Automation Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3T-ST22M 5M |
Omron E3T-ST22M 5M Photoelectric Sensor - Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Shape | Square type |
| Sensing Distance | 300mm |
| 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 | Dark-ON |
| Response Time | 1 ms max. |
| Degree Of Protection | IP67 |
| Material | Polybutylene terephthalate |
| Material Lens | Denatured Polyarylate |
| Weight | 40g |
The Omron E3T-ST22M 5M Photoelectric Sensor provides through-beam sensing across a 300 mm distance with an NPN output and Dark-ON switching configuration. A red LED establishes the optical path between the emitter and receiver, while the built-in amplifier processes the change caused when a target interrupts that path. The sensor operates from 12 to 24 VDC, responds within 1 ms maximum, and includes a 5 m pre-wired cable. Maximum current consumption is 30 mA, divided between 10 mA maximum at the emitter and 20 mA maximum at the receiver. Its M3-mounting and ultracompact square format support sensing positions where installation space is limited.
For an Omron through-beam sensor requiring an M3 format, NPN output, and extended cable length, the applicable model is the E3T-ST22M. Dark-ON operation means the output behavior follows the specified Dark-ON switching arrangement rather than the Light-ON logic used by related E3T versions. The supplied specification states IP67 protection and lists PBT and denatured polyarylate as construction materials. This configuration also suits searches for an Omron 5 m photoelectric sensor and Omron M3 Dark-ON sensor. For a related Light-ON version with the same M3 mounting, 300 mm sensing distance, and 5 m cable, see the E3T-ST21M 5M. Both models operate from the same 12 to 24 VDC supply range.
