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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 10–30 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.

BrandOmron
Product TypePhotoelectric Sensor
Model NumberE3FB-LP21

Omron E3FB-LP21 Photoelectric Sensor – Technical Specifications

SpecificationValue
Sensing MethodBackground suppression
Sensing Distance100 mm (white paper: 300 Γ— 300 mm)
Light SourceRed LED (624 nm)
Power Supply Voltage10 to 30 VDC (include voltage ripple of 10%(p-p) max.)
Output configurationPNP
Connection MethodM12 Connector
Current Consumption25 mA max.
Control OutputLoad current: 100 mA max. (Residual voltage: 3 V max.), Load power supply voltage: 30 VDC max.
Operation ModeLight-ON/Dark-ON selectable by wiring
Response Time0.5 ms
Sensitivity AdjustmentFixed
IndicatorsOperation indicator (orange) Stability indicator (green)
Ambient IlluminationIncandescent lamp: 3,000 lx max./ Sunlight: 10,000 lx max.
Ambient Temperature RangeOperating: -25 to 55Β°C/ Storage: -40 to 70Β°C (with no icing or condensation)
Ambient Humidity RangeOperating: 35 to 85%/ Storage: 35 to 95% (with no condensation)
Insulation Resistance20 MΞ© min. at 500 VDC
Dielectric Strength1,000 VAC at 50/60 Hz for 1 min. between current-carrying parts and case
Vibration ResistanceDestruction: 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y and Z directions
Shock ResistanceDestruction: 500 m/s2 3 times each in X, Y and Z directions
Protection CircuitsPower supply reverse polarity protection, Output short-circuit protection, and Output reverse polarity protection
Degree of ProtectionIEC: IP67, DIN 40050-9: IP69K
MaterialNickel-brass, PMMA, POM, Nickel-brass
WeightApprox. 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, 10–30 VDC supply, IP69K rating, and metal M18 housing, it maintains accuracy even in harsh conditions. Omron’s engineering ensures longevity, reduced maintenance, and precise performance across automated inspection and material handling processes in India’s industrial sectors, reinforcing trust in Omron’s reliable sensing technology for critical automation tasks.

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