CX-421-P-J is a compact diffuse reflective photoelectric sensor from the CX-400 series, designed for reliable object detection in industrial automation applications. It features PNP output with a sensing range of 300 mm (11.811 in) using white non-glossy paper as the standard object, and utilizes an infrared LED as the emitting element. The sensor operates on a 12 to 24 V DC supply voltage and includes an M12 pigtailed connector type with a 300 mm cable length for flexible installation. It incorporates stability and operation indicators, sensitivity adjustment, and automatic interference prevention for enhanced performance. The sensor conforms to EMC Directive and has UL Recognition, making it suitable for factory automation, packaging, and material handling applications where compact size and reliable detection are required.