Photoelectric switches were originally introduced from foreign countries, and the brand advantages of foreign countries have enabled their products to occupy most of the market. At present, the quality of foreign products is still higher, but domestic brands are also catching up. Some enterprises hope to use foreign brands, but are often troubled by counterfeit and inferior products. Therefore, it is suggested not to purchase branded products with advantages at the counter. It's easy to get in touch now, so you can directly contact the brand manufacturer or office to prevent counterfeit brands from taking advantage of loopholes.