Omron E3T-ST12 5M Photoelectric Sensor
Omron E3T-ST12 5M is an ultrathin through-beam photoelectric sensor designed for object sensing across a 1 m distance. Its red LED establishes the optical beam between the emitter and receiver, while the NPN output supplies the switching state to compatible PLC inputs and industrial control circuits. Dark-ON operation defines the specified output behavior, and response time is 1 ms max. The sensor operates from 12 to 24 VDC and includes a 5 m pre-wired cable for longer wiring between the sensing point and control equipment. Total current consumption is 30 mA max. across both sides. Within the E3T Series, the E3T-ST12 5M provides the extended-cable Dark-ON option. Related 1 m NPN through-beam sensors can be explored across Omron Sensing Range.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3T-ST12 5M |
Omron E3T-ST12 5M Photoelectric Sensor - Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Shape | Square type |
| Sensing Distance | 1 m |
| 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-ST12 5M Photoelectric Sensor uses through-beam sensing across a 1 m distance in an ultrathin square format. A red LED establishes the optical beam between the emitter and receiver, while the NPN output transfers the switching state from the receiving side to compatible industrial control circuitry. Dark-ON operation defines the specified output behavior. The sensor operates from 12 to 24 VDC and consumes 30 mA max. in total, with 10 mA max. for the emitter and 20 mA max. for the receiver. Operate or reset time is specified at 1 ms max. A 5 m pre-wired cable provides additional wiring length between the sensing position and control equipment.
For an Omron Dark ON through beam sensor requiring NPN output, 1 m sensing, and extended wiring, the relevant model is the E3T-ST12. Polybutylene terephthalate is listed for the housing and denatured polyarylate for the optical section. IP67 protection is specified, while approximate weight is 40 g. Its configuration also suits searches for an Omron 5 m cable NPN sensor and Omron 1 m Dark ON sensor. The 1 ms response supports fast presence sensing and position confirmation across compact machine openings. For the corresponding Light-ON version with the same 5 m cable and sensing distance, see E3T-ST11 5M.
