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Omron E3RA-TP21 Photoelectric Sensor
The Omron E3RA-TP21 Photoelectric Sensor features through-beam detection with a 15 m sensing distance using Emitter: E3RA-TP21-L and Receiver: E3RA-TP21-D for accurate long-range object detection. It operates on a 10β30 VDC power supply with a reliable PNP output and M12 connector for easy installation. This model is part of the Omron automation range under the Omron Photoelectric Sensors category and the Omron E3RA Series. Equipped with a red LED (624 nm) light source, Light-ON/Dark-ON selectable mode, 0.5 ms response time, 40 mA current consumption, and IP67/IP69K protection, it ensures stable performance in harsh industrial environments.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3RA-TP21 |
Omron E3RA-TP21 Photoelectric Sensor β Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Sensing Distance | 15 m |
| Standard Sensing Object | Opaque: 7 mm dia.min. |
| Light Source | Red LED (624 nm) |
| Power Supply Voltage | 10 to 30 VDC (include voltage ripple of 10%(p-p) max.) |
| Output Configuration | PNP |
| Connection Method | M12 Connector |
| Current Consumption | 40mA max. |
| Control Output | Load current: 100 mA max. (Residual voltage: 2 V max.), Load power supply voltage: 30 VDC max. |
| Operation Mode | Light-ON/Dark-ON selectable by wiring |
| Response Time | 0.5 ms |
| Sensitivity Adjustment | One-turn adjuster |
| Indicators | Operation indicator (orange) Stability indicator (green) |
| Ambient Illumination | Incandescent lamp: 3,000 lx max./ Sunlight: 10,000 lx max. |
| Ambient Temperature Range | Operating: -25 to 55Β°C/ Storage: -40 to 70Β°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35 to 85%/ Storage: 35 to 95% (with no condensation) |
| Insulation Resistance | 20 MΞ© min. at 500 VDC |
| Dielectric Strength | 1,000 VAC at 50/60 Hz for 1 min. between current-carrying parts and case |
| Vibration Resistance | Destruction: 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y and Z directions |
| Shock Resistance | Destruction: 500 m/s2 3 times each in X, Y and Z directions |
| Protection Circuits | Power supply reverse polarity protection, Output short-circuit protection, and Output reverse polarity protection |
| Degree Of Protection | IEC: IP67, DIN 40050-9: IP69K |
| Material | ABS, PMMA, POM, POM |
| Weight | Approx. 20 g/ Approx. 10 g |
The Omron E3RA-TP21 Photoelectric Sensor from the Omron E3RA Series is a through-beam type designed for reliable object detection in industrial automation. It includes an Emitter (E3RA-TP21-L) and Receiver (E3RA-TP21-D) pair, offering a 20 m sensing distance using a red LED light source. Operating at 10 to 30 VDC, it provides a PNP open-collector output with Light-ON or Dark-ON selection. Its M18 plastic cylindrical housing ensures durability and protection under IP67 and IP69K ratings for demanding factory conditions.
Ideal for conveyor systems, packaging machinery, and automated assembly lines, this sensor ensures stable detection performance even in dusty or wet environments. It minimizes false triggers during high-speed operations, supporting precise part positioning and product counting. The single-turn sensitivity adjuster on the receiver allows quick fine-tuning during installation, making it suitable for OEM machine builders and end users in industrial automation sectors across India.
The Omron E3RA-TP21 Photoelectric Sensor provides dependable PNP output with a robust radial optical design. For engineers requiring a similar through-beam model with an NPN output, the Omron E3RA-TN21 Photoelectric Sensor offers the same 20 m sensing distance and M12 connector configuration. Those preferring a pre-wired cable type can opt for the Omron E3RA-TP11 2M Photoelectric Sensor, which includes a 2 m pre-wired cable for direct wiring setups. Alternatively, applications that require retro-reflective operation with mirror-surface reflection can use the Omron E3RA-RP21 Photoelectric Sensor, offering 0.1 to 4 m sensing distance using an E39-R1S reflector. The Omron E3RA-TP21 remains the preferred choice for high-precision long-distance through-beam sensing in automated equipment.
Engineered by Omron Corporation, the E3RA-TP21 model ensures dependable sensing under varying temperature conditions from β25Β°C to 55Β°C. Its IP69K-rated ABS body withstands high-pressure washdowns, making it suitable for food, packaging, and automotive environments. With its PNP output, 20 m detection range, 0.5 ms response time, and M12 connector interface, it provides consistent and long-lasting performance. Omronβs trusted reliability and precision engineering make this sensor a preferred solution across Indiaβs industrial automation landscape.
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