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E3T-ST31-G Safety Light Curtain | F3SJ Series Industrial Safety Sensor

The Omron E3T-ST31-G is an ultracompact through-beam photoelectric sensor with a built-in amplifier, designed for precise object detection in space-limited industrial automation applications.

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Technical Specifications Parameter Specification Model Number E3T-ST31-G Manufacturer Omron Series E3T Sensor Type Photoelectric Sensor Detection Method Through-beam type Sensing Distance 2 m Standard Detectable Object Opaque object ≥ Ø3 mm Light Source Red LED (approx. 650 nm) Output Type NPN open collector Output Mode Light-ON (standard for ST31 series) Supply Voltage 12–24 VDC ±10% Current Consumption Emitter: ≤10 mA / Receiver: ≤20 mA Control Output ≤50 mA, 26.4 VDC max Response Time ≤ 1 ms Connection Type Pre-wired cable (standard 2 m / 5 m variants) Housing Type Ultracompact rectangular side-view Protection Circuit Reverse polarity protection, short-circuit protection Indicator Operation LED (variant-dependent green indicator) Protection Rating IP67 Operating Temperature -25°C to +55°C Storage Temperature -40°C to +70°C Humidity 35%–85% RH (non-condensing) Insulation Resistance ≥20 MΩ (500 VDC) Dielectric Strength AC 1000 V for 1 min Vibration Resistance 10–2000 Hz, 1.5 mm double amplitude Shock Resistance 1000 m/s² (3 times each axis) Housing Material PBT (polybutylene terephthalate) Lens Material Polyarylate resin