Procurement teams shortlist E3FB-LP21 with Omron SMPS 24V 10A and Omron Sensors, aligning budget approvals, warranty terms, and multisite availability for smoother rollout across plants.
Omron E3FB-LP21 Photoelectric Sensor
The Omron E3FB-LP21 Photoelectric Sensor offers background suppression with a 100 mm sensing distance, PNP output, and durable metal housing for precise industrial performance. It operates on a 10β30 VDC power supply and includes an M12 connector for secure connectivity. Manufactured by Omron under the Omron Photoelectric Sensors category, this model belongs to the Omron E3FB Series. Featuring a red LED (624 nm) light source, Light-ON/Dark-ON selectable mode, 25 mA current consumption, and 0.5 ms response time, it ensures high-speed, accurate detection in automation systems.

| Brand | Omron |
| Product Type | Photoelectric Sensor |
| Model Number | E3FB-LP21 |
Omron E3FB-LP21 Photoelectric Sensor β Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Background suppression |
| Sensing Distance | 100 mm (white paper: 300 Γ 300 mm) |
| 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 | 25 mA max. |
| Control Output | Load current: 100 mA max. (Residual voltage: 3 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 | Fixed |
| 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 | Nickel-brass, PMMA, POM, Nickel-brass |
| Weight | Approx. 50 g/ Approx. 20 g |
The Omron E3FB-LP21 Photoelectric Sensor is a compact sensing device from the Omron E3FB Series used for reliable detection in industrial automation systems. It features a background suppression (BGS) sensing method, 100 mm fixed sensing distance, PNP open collector output, and M12 connector interface. With its metal M18 cylindrical housing and red LED light source, this Omron model offers durability and precision in detecting objects under varying ambient conditions. Designed for factory automation, it supports 10 to 30 VDC operation and ensures stable sensing in demanding industrial environments.
Widely applied in industrial automation, this model is used for accurate object detection in conveyors, bottling, and packaging machinery. It provides consistent background suppression to prevent false detection of reflective surfaces, enhancing process efficiency. The IP67 and IP69K protection ratings make it suitable for environments that require frequent washdowns, such as food and beverage plants or assembly lines. Its fixed sensitivity design ensures stable and maintenance-free operation, offering precise and repeatable results in automated production setups.
The Omron E3FB-LP21 Photoelectric Sensor provides stable detection using PNP output and red LED light, ideal for short-range sensing. For variations within the same series, users can select the Omron E3FB-LN21 Photoelectric Sensor featuring an NPN output type for controllers that require negative logic. The Omron E3FB-LP11 2M Photoelectric Sensor offers similar specifications but comes with a pre-wired 2 m cable instead of an M12 connector. Alternatively, the Omron E3FB-LN11 2M Photoelectric Sensor provides NPN output and a 2 m pre-wired cable configuration for flexible wiring integration in compact setups. The Omron E3FB-LP21 ensures consistent detection performance within this robust metal-bodied family.
The Omron E3FB-LP21 Photoelectric Sensor combines rugged construction, fast response, and high environmental protection, making it dependable for machine automation and detection systems. With its 100 mm sensing distance, 10β30 VDC supply, IP69K rating, and metal M18 housing, it maintains accuracy even in harsh conditions. Omronβs engineering ensures longevity, reduced maintenance, and precise performance across automated inspection and material handling processes in Indiaβs industrial sectors, reinforcing trust in Omronβs reliable sensing technology for critical automation tasks.




