YIDA-21磁性开关是一种广泛应用于工业自动化领域的传感器元件，主要用于检测气缸等设备的位置。它具有多种优势，如响应速度快、精度高、可靠性强，能够在复杂的工业环境中稳定工作。其价格因具体型号、配置及采购数量等因素而有所不同，一般可通过与供应商洽谈获取详细报价。目前，国内有多家专业生产YIDA-21磁性开关的企业，如上海双旭电子有限公司、上海五久自动化设备有限公司等。这些企业不仅具备专业的技术水平，还提供良好的售后服务和优质的解决方案。

The YIDA-21 magnetic switch is a widely used sensor component in the field of industrial automation, mainly used for detecting the position of cylinders and other equipment. It has several advantages, such as fast response speed, high precision, and strong reliability, allowing it to operate stably in complex industrial environments. The price of the YIDA-21 magnetic switch varies depending on the specific model, configuration, and purchase quantity, and detailed quotations can generally be obtained through consultation with suppliers. At present, there are several professional manufacturers of YIDA-21 magnetic switches in China, such as Shanghai Shuangxu Electronics Co., Ltd and Shanghai Wujiu Automation Equipment Co., Ltd. These companies not only possess professional technical capabilities but also provide good after-sales service and high-quality solutions.