Shaanxi Topsail Electric Technology Co., Ltd. is a high-tech company established in 2010, with office located in Xi'an city and 500 square meter manufacturing center located in Hu county, Xi'an city. The company is engaged in research & development, manufacturing, and also marketing of intelligent measurement instruments, which includes:1.IOT SENSORS*Wireless Pressure Transmitter (GPRS, NB-IoT, LoRaWAN, RF)*Wireles Level Transmitter (GPRS, NB-IoT, LoRaWAN, RF)*Wireles Pipeline Temperature Transmitter (GPRS, NB-IoT, LoRaWAN, RF)*Wireless Temperature Humidity Sensor (GPRS, WIFI, NB-IoT, Zigbee)2.DATA LOGGERS*Disposable temperature or/& humidity data logger (USB)*Multiple use temperature or/& humidity data logger (USB)*Level data logger (RS485)These products are widely used in following applications: Smart fire hydrant system, Smart building management, Water supply & drainage, Urban plumbing system, oil & gas industry, Smart irrigation, Industrial automation, Cold chain storage & shipment and more.Topsail is ISO9001 certified, and Part of our products are Ceprei & CNEx certified. Meanwhile, It is also a member of CHINA NB-IoT Industry Alliance, observer member of CLAA IoT Connectivity Alliance, member of China LoRa Application Alliance, board member of China Unicom IoT Alliance. Till now it has achieved 7 patents for different IoT sensors.Topsail is also a long-term strategic partner of China Mobile, China Unicom, China Telecom and HUAWEI. Our IoT hardware had established cooperation with over 100 software solution companies, and they've been applied in over 1000 fire hydrant projects, covering nearly 1500 units of buildings or communities, including very famous places, such as Shanghai HongQiao Station, Shanghai HongQiao Airport, Shanghai SNIEC (where MWC18 was hold), Shanghai Bund, Beijing the Summer palace, Lanzhou Concert Hall etc.Topsail will continue to develop more high-tech loggers and IoT sensors to meet the newest trends and requirements from target markets, serve customers with sincere attitude, best quality products, considerate technical support and good after-sale service, to achieve a win-win cooperation.Welcome to contact us anytime!