Compact Through-Beam Photoelectric Sensor E3T-ST13 with 5mm Sensing Distance

Comprehensive Overview: Omron E3T-ST13 Photoelectric Sensor

The Omron E3T-ST13 Photoelectric Sensor represents the pinnacle of industrial sensing technology within the globally trusted E3T series. Engineered specifically for mission-critical automation environments, this through-beam sensor utilizes a precisely aligned transmitter/receiver system to deliver uncompromising detection accuracy across extended operational ranges. Designed to excel in harsh industrial settings—including manufacturing plants, logistics hubs, and automated assembly lines—the E3T-ST13 maintains consistent performance under temperature extremes, vibrational stress, and intermittent particulate exposure. Its robust architecture ensures seamless integration into Industry 4.0 ecosystems while providing fail-safe object detection for precision-driven processes.

Advanced Technical Features and Operational Advantages

• High-Precision Through-Beam Technology: Independent transmitter (E3T-T13) and receiver (E3T-ST13) units enable detection ranges up to 15 meters, with infrared LED light sources ensuring immunity to ambient light interference and reliable operation in low-visibility conditions.
• Extended Voltage Range: 12-24 VDC ±10% compatibility integrates effortlessly with diverse industrial power systems including PLCs, motor controllers, and automated machinery backbones without requiring additional voltage regulation.
• Ultra-Low Power Consumption: Maximum 15 mA current draw at 24 VDC minimizes energy costs and reduces thermal load in high-density control panels.
• High-Speed Response: 1 ms maximum response time captures rapid-moving objects on conveyor systems operating at speeds exceeding 2 m/s, eliminating production line false triggers.
• Industrial-Grade Durability: ABS resin housing with IP50 protection (IEC 60529 standard) resists airborne particulates and mechanical impacts, while operational temperature resilience (-25°C to +55°C) ensures functionality in freezer warehouses or foundry adjacent zones.
• Simplified Integration: Pre-terminated 2-meter PVC cable (color-coded: brown +V, blue 0V, black output) enables tool-free connection to industry-standard NPN control systems. Compact 18 × 34 × 8.5 mm profile facilitates mounting in space-restricted locations.
• NPN Open Collector Output: Direct compatibility with Omron CP/CS/CJ-series PLCs, Siemens S7 controllers, Allen-Bradley CompactLogix systems, and other industrial automation platforms.
• Omron Quality Assurance: Backed by a comprehensive 1-year manufacturer warranty against defects, validated through ISO 9001-certified production processes.

Critical Industrial Implementation Scenarios

The E3T-ST13 photoelectric sensor delivers operational excellence across multiple automation domains:

• High-Velocity Conveyor Monitoring: Precise carton counting and jam detection in bottling plants and parcel distribution centers, with sampling rates supporting line speeds up to 240 packages/minute.
• Robotic Assembly Verification: Component presence confirmation in automotive manufacturing cells, providing feedback signals to Fanuc/Yaskawa robotic controllers for error-proof assembly sequences.
• Pharmaceutical Packaging: Blister pack positioning verification within ISO Class 8 cleanrooms, utilizing the sensor's contamination-resistant housing.
• Bulk Material Handling: Detection of irregularly shaped aggregates on vibrating feeders for mining and aggregate industries, with vibration resistance up to 10-55 Hz at 1.5mm amplitude.
• Automated Storage Systems: Pallet presence sensing in AS/RS warehouses with 98%+ detection accuracy at maximum 15m beam distance.

Precision Technical Specifications

Engineering Parameter	Technical Specification
Full Model Designation	E3T-ST13 (Receiver Unit), Requires E3T-T13 Transmitter
Detection Methodology	Through-beam (Infrared LED 870 nm wavelength)
Sensing Distance	15 meters maximum (Transmitter-Receiver alignment)
Supply Voltage Range	12-24 VDC ±10% (Ripple P-P ≤ 10%)
Current Consumption	≤15 mA @ 24 VDC (No load)
Output Circuit Type	NPN open collector (30 VDC max, 100 mA max)
Response Time	1 ms maximum (Light-ON/Dark-ON selectable)
Ambient Operating Temperature	-25°C to +55°C (Non-condensing environment)
Storage Temperature Range	-30°C to +70°C
Ingress Protection Rating	IP50 (Limited dust ingress protection, no water resistance)
Housing Composition	Flame-retardant ABS resin (UL94 V-0 equivalent)
Connection Interface	Fixed 2-meter shielded cable (0.3 mm² x 3 cores)
Unit Mass	15 g ±1 g (Receiver only)
Compliance Standards	CE, RoHS, UL/cUL (File E95239)
Warranty Coverage	12 months manufacturer warranty from invoice date

Installation Guidelines and System Integration

Optimize E3T-ST13 performance with precise transmitter-receiver alignment within ±15° horizontal/vertical tolerance. Mounting brackets (sold separately) enable secure M4 screw fixation on machinery frames, conveyor edges, or robotic end-effectors. The NPN output seamlessly interfaces with PLC input modules (e.g., Omron CJ1W-ID231, Siemens 6ES7521-1BH00-0AA0) using standard 3-wire sinking logic. Maintain optical axis clearance from reflective surfaces (> detection distance x 0.7) to prevent beam interference. For optimal maintenance access, ensure minimum 50mm clearance around sensor bodies in confined installations.