There is no verified information available about a manufacturer named "DUPO" producing industrial switches.

Currently, no sources confirm the existence of a company called DUPO in the industrial switch market. If you are searching for industrial switch manufacturers, there are several reputable alternatives that provide a wide range of products for industrial applications. For example, IQS Directory lists leading manufacturers and suppliers of electric switches, including custom designs, membrane switches, and safety switches suitable for industrial, commercial, and OEM applications (IQS Directory) . DirectIndustry also provides a catalog of industrial switches, including emergency-stop switches, roller lever switches, and push-button switches for harsh environments (DirectIndustry) . For industrial networking and Ethernet switches, companies like Maisvch offer ruggedized Layer 2/3 managed and unmanaged switches, PoE switches, and DIN-rail solutions designed for extreme conditions, including coal mining, rail transit, and power grid applications (Maisvch) . These manufacturers provide certifications, OEM/ODM services, and solutions for IIoT and Industry 4.0 environments. If your goal is to source industrial switches, it may be more effective to explore these established manufacturers or directories to find products that meet your specifications, rather than searching for DUPO, which does not appear in the available industrial switch listings.