Hangzhou Chengqian Technology Co., Ltd. is a comprehensive strength company that integrates research and development and sales. In recent years, it has undertaken multiple temperature and humidity monitoring projects, distributed and wholesaled various temperature and humidity sensors, temperature and humidity transmitters, serial servers, GPRS/3G modules, and industrial SMS alarms (which have been purchased in bulk by several domestic power companies). Among them, the independently developed DW485N series temperature and humidity transmitters have been recognized by customers in environmental fields such as computer rooms, (drugs, ammunition, military, goods) warehouses, production workshops, and greenhouses. We have also established long-term and stable cooperative relationships with several strong domestic engineering companies. In the field of temperature and humidity monitoring, our company has a complete range of products at reasonable prices, ensuring product quality, valuing credit, and winning numerous customers with the characteristic of multi variety operation and the principle of low profit and high sales volume.