Yantai Hengsheng Chemical Technology Co., Ltd. was established on March 11, 2015, the main business scope for chemical product development, sales, office supplies, consumables, building materials, textiles, hardware, mechanical parts wholesale, retail, import and export of goods and technologies. In the production process, toluene, methanol, tetrahydrofuran and other toxic and harmful gases will be produced. The company has developed solutions for toxic and harmful gases, and provided them with ASD5300C gas detector, ASD5300 gas detector, ASD5100 gas alarm and sound and light alarm equipment.