Omron E3T-ST32 5M Ultracompact Through-Beam Photoelectric Sensor
Omron E3T-ST32 5M is an ultracompact through-beam photoelectric sensor intended for target sensing across a distance of 2 m. A red LED creates the optical path between the emitter and receiver, while the integrated amplifier evaluates the beam interruption produced by the target. Its NPN output transfers the switching state to compatible industrial control circuitry, and Dark-ON operation provides the specified logic. The sensor operates from 12 to 24 VDC and includes a 5 m pre-wired cable for longer wiring runs. Maximum current consumption is 30 mA, with 10 mA for the emitter and 20 mA for the receiver. Within the E3T Series, the E3T-ST32 5M provides the extended-cable Dark-ON version. Related ultrathin through-beam sensors can be explored across Omron Automation Sensors.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3T-ST32 5M |
Omron E3T-ST32 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 | Dark-ON |
| Response Time | 1 ms max. |
| Degree Of Protection | IP67 |
| Material | Polybutylene terephthalate |
| Material Lens | Denatured Polyarylate |
| Weight | 40g |
The Omron E3T-ST32 5M Photoelectric Sensor provides through-beam sensing across a 2 m distance with NPN output and Dark-ON operation. Its red LED establishes the optical path between the emitter and receiver, while the built-in amplifier evaluates the change produced when a target interrupts the beam. The sensor operates from 12 to 24 VDC, provides a 1 ms maximum response time, and includes a 5 m pre-wired cable for extended wiring. Total current consumption is 30 mA maximum, including 10 mA maximum for the emitter and 20 mA maximum for the receiver. The ultracompact square body and M2-mounting format support sensing points where available installation space is limited.
For an Omron through-beam sensor requiring NPN output, Dark-ON switching, and a longer pre-wired cable, the applicable model is the E3T-ST32. The supplied specification states IP67 protection and lists PBT and denatured polyarylate as construction materials. Its 2 m sensing range supports longer optical paths than the 300 mm E3T variants while retaining a compact body. Search terms such as Omron 2 m photoelectric sensor and Omron 5 m NPN sensor also fit this configuration. For the related Light-ON version with the same 2 m sensing range and 5 m cable, see the E3T-ST31 5M. Selection between the two models depends on the required switching behavior.
