Qinhuangdao Diya Mechanical Technology Development Co., Ltd. sells Dwyer level switches and Dwyer level gauges from the United States. Dwyer Company is an American instrument manufacturing corporation specializing in the measurement, transmission, and control of differential pressure, temperature, pressure, level, and flow, offering a comprehensive range of instruments. Established in 1931, Dwyer relocated its manufacturing headquarters from Chicago, Illinois to Michigan City, Indiana in 1955, where it built new, advanced manufacturing plants and auxiliary facilities. Subsequently, the company established four additional plants in Wakarusa, South Whitley, Kingsbury, and Walkerton, Indiana, followed by manufacturing facilities in Anaheim, Indiana; Fergus Falls, Minnesota; Kansas City, Missouri; and Naguabo, Puerto Rico. Dwyer boasts a renowned trademark series including Magnehelic, Photohelic differential pressure control instruments, Spirahelic pressure control instruments, Rate-Master, Mini-Master, and Visi-Float flow meters, Slack-Tube and Flex-Tube manometers, Dwyer ultra-low differential pressure switches, Flotect flow/level switches, Hi-Flow control valves, Self-Tune temperature controllers, and Iso-Verter signal converters/isolators. These products are manufactured by Dwyer's four divisions: Mercoid, W.E. Anderson, Proximity Controls, and Love Controls. With reasonable prices, year-round supply, and service levels that make your work efficient and effortless! We welcome customers to contact us via phone or mail. Our company is dedicated to serving you wholeheartedly.