During technical comparisons, E3FA-DN21 appears alongside Omron Photoelectric Sensor, E3Z D61 2M and Omron Sensors so engineers assess signal types, ingress protection, and ambient tolerances accurately.
Omron E3FA-DN21 Photoelectric Sensor
The Omron E3FA-DN21 Photoelectric Sensor is a diffuse-reflective type sensor offering 100 mm sensing distance with a red LED (624 nm), NPN output, and M12 connector. Operating on a 10β30 VDC power supply, it is part of the Omron industrial automation portfolio under the Omron Photoelectric Sensors category and the Omron E3FA Series. Built with a durable plastic housing, this model ensures stable and efficient operation in compact sensing applications.
| Brand | Omron |
| Product Type | Photoelectric Sensor |
| Model Number | E3FA-DN21 |
Omron E3FA-DN21 Photoelectric Sensor β Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Diffuse-reflective |
| 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 | NPN |
| 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 | 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 |
Omron E3FA-DN21 Photoelectric Sensor is a compact diffuse-reflective sensor used in industrial automation. It features a diffuse-reflective sensing method, a 100 mm sensing distance, and operates on 10 to 30 VDC with an NPN output. The Omron E3FA-DN21 Photoelectric Sensor includes an M12 connector, one-turn sensitivity adjuster, and operation/stability indicators, and it belongs to the E3FA Series for factory and process automation applications.
Designed for conveyors, packaging lines and assembly stations, this photoelectric sensor provides reliable part detection and position sensing. Its 0.5 ms response time and selectable Light-ON/Dark-ON wiring deliver stable outputs for PLC inputs and machine controls. The rugged IP67/IP69K rating and wide ambient temperature range make it suitable for industrial environments where consistent detection and low maintenance are required.
Omron E3FA-DN21 Photoelectric Sensor β related options include Omron E3FA-DP21 Photoelectric Sensor which is similar in form factor but provides a PNP output for sourcing applications, Omron E3FA-DN11 2M Photoelectric Sensor which keeps the NPN output yet is supplied with a 2 m pre-wired cable instead of an M12 connector, and Omron E3FA-RN21 Photoelectric Sensor which uses a retro-reflective method with MSR and offers much longer sensing range options; Omron E3FA-DN21 remains the choice when a short-range, M12-connector NPN diffuse sensor is required.
For engineers choosing components, the Omron E3FA-DN21 Photoelectric Sensor offers a clear technical profile: 100 mm sensing, 10β30 VDC supply, NPN output, and M12 connection. Omronβs reputation and the sensorβs protection circuits (reverse-polarity, short-circuit protection) ensure reliable operation in automated lines. The E3FA Series classification and consistent specs make the E3FA-DN21 suitable for PLC integration and repeatable detection tasks across Indiaβs manufacturing and packaging installations.
