Omron E3T-ST24 2M Ultracompact Photoelectric Sensor
Omron E3T-ST24 2M is an ultracompact through-beam photoelectric sensor with PNP output for sensing targets across a 300 mm distance. A red LED establishes the optical path between the emitter and receiver, while the built-in amplifier processes the beam interruption created by the target. Dark-ON operation defines the stated switching behavior, and the response time is specified at 1 ms maximum. The sensor operates from 12 to 24 VDC and includes a 2 m pre-wired cable. Maximum current consumption is 30 mA, divided between 10 mA maximum for the emitter and 20 mA maximum for the receiver. Within the E3T Series, the E3T-ST24 2M provides the PNP Dark-ON configuration. Related PNP through-beam sensors are available across Omron Industrial Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3T-ST24 2M |
Omron E3T-ST24 2M 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 | PNP |
| Connection Method | Pre-wired cable length 2m |
| 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-ST24 2M Photoelectric Sensor uses through-beam sensing across a 300 mm distance with PNP output and Dark-ON switching. Its red LED establishes the optical path between the emitter and receiver, while the built-in amplifier processes the change caused when a target blocks that path. The PNP output communicates the resulting switching state to compatible PLC or machine-control inputs. Operating voltage is 12 to 24 VDC, response time is specified at 1 ms maximum, and a 2 m pre-wired cable provides the electrical connection. Current consumption is 30 mA maximum, with the emitter drawing up to 10 mA and the receiver drawing up to 20 mA.
For an Omron through-beam sensor requiring PNP output, Dark-ON operation, and a 300 mm sensing distance, the relevant model is the E3T-ST24. Its compact M2-mounting format is intended for restricted installation areas where a conventional sensor body may require more space. PBT and denatured polyarylate are listed as construction materials, while IP67 protection is specified for the enclosure. The model also suits searches for an Omron PNP through-beam sensor and Omron ultracompact photoelectric sensor. For an NPN Dark-ON alternative with the same 300 mm sensing distance and 2 m pre-wired cable, see the E3T-ST22 2M. Output architecture is the key electrical distinction between these related configurations.
