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                Dandong Hui Kai sensor Co., Ltd. is located in Dandong, Liaoning, China, with beautiful scenery along the Yalu River. The company independently designs and developed hot spring swimming pool hydrotherapy sensor, the swimming pool temperature display and the bath equipment controller which apparatus three big series with more than 50 varieties, also it has obtained more than 30 national patents. The company has been established for more than 20 years which has won the market all over the country with the quality and has built the Huikai brand with the good faith at the same time.