中文介绍
E3JK-R4Y2是一款高性能的光电开关，广泛应用于工业自动化领域。它采用回归反射型检测方式，通过反射板实现对物体的精准检测。该产品具有较长的检测距离，能够适应多种复杂的工作环境，其检测距离可达数米，适用于检测不透明物体。
E3JK-R4Y2光电开关的电源电压范围为10-30VDC，能够满足不同设备的供电需求。其输出形式为继电器触点输出，可实现稳定的信号传输。此外，该产品还具备良好的抗干扰能力，能够在复杂的电磁环境中稳定工作。
在设计上，E3JK-R4Y2光电开关体积小巧，外形尺寸为M18×50×50mm，便于安装在各种设备上，节省空间。它还具备较高的防护等级，能够防止灰尘和水汽的侵入，从而延长使用寿命。
E3JK-R4Y2光电开关适用于多种行业，如机械制造、纺织、轻工、造纸、印刷和包装等。它能够与PLC、伺服控制器、变频器等设备连接，实现自动化控制。
目前，E3JK-R4Y2光电开关的生产厂家众多，其中包括欧姆龙自动化（中国）有限公司。欧姆龙作为全球知名的自动化设备制造商，以其先进的技术和严格的质量控制体系，确保了产品的高性能和可靠性。此外，上海双旭电子有限公司也生产该型号产品，并提供良好的售后服务和优质的解决方案。
E3JK-R4Y2光电开关的价格因生产厂家、销售渠道和采购数量等因素而有所不同。一般来说，其价格在几百元人民币左右。

English Introduction
The E3JK-R4Y2 photoelectric switch is a high-performance sensor widely used in industrial automation. It employs a retro-reflective detection method, which relies on a reflector to achieve precise object detection. With a long detection range, this switch can adapt to various complex working environments and is suitable for detecting opaque objects.
The E3JK-R4Y2 operates within a voltage range of 10-30VDC, meeting the power supply requirements of different devices. It features a relay contact output, ensuring stable signal transmission. Moreover, the switch has strong anti-interference capabilities, allowing it to work stably in complex electromagnetic environments.
In terms of design, the E3JK-R4Y2 photoelectric switch is compact, with dimensions of M18×50×50mm, making it easy to install on various equipment and saving space. It also has a high protection rating, preventing dust and moisture ingress, thereby extending its service life.
The E3JK-R4Y2 photoelectric switch is applicable to a variety of industries, including mechanical manufacturing, textiles, light industry, papermaking, printing, and packaging. It can be connected to PLCs, servo controllers, frequency converters, and other devices to achieve automated control.
Currently, there are numerous manufacturers of the E3JK-R4Y2 photoelectric switch. Omron Automation (China) Co., Ltd is one of them. Omron, a globally renowned manufacturer of automation equipment, ensures the high performance and reliability of its products through advanced technology and strict quality control systems. In addition, Shanghai Shuangxu Electronics Co., Ltd also produces this model and offers good after-sales service and high-quality solutions.
The price of the E3JK-R4Y2 photoelectric switch varies depending on the manufacturer, sales channel, and purchase quantity. Generally, it is priced at several hundred yuan.