The Omron E3FB-TN11 2M Photoelectric Sensor offers Cylindrical axial, Through-beam, 20m sensing distance, NPN, 10 to 30 VDC Power Supply Voltage. Manufactured by Omron under the Omron Photoelectric Sensors category, this model belongs to the Omron E3FA Series and includes an Emitter (E3FB-TN11-L 2M) and Receiver (E3FB-TN11-D 2M), it utilizing a Red LED Light source.