Longson Keli (Shanghai) Instrumentation Co., Ltd.

Longson Keli (Shanghai) Instrumentation Co., Ltd. is located in Xinzhuang Industrial Park, Minhang, Shanghai. It is a Sino-American joint venture high-tech enterprise specializing in SF6 gas solutions. Currently, the company's main product series include: density relays, density gauges, pressure gauges, valve devices, density transmitters, online monitoring systems, wireless and fiber-optic remote transmission density relays, etc. Longson Keli has always adhered to the development concept of technological innovation and possesses the industry's most advanced production and testing equipment. The company has established a strict and comprehensive production quality supervision and management system, and has passed the ISO 9001:2008 quality management system certification issued by SGS Switzerland. We have built a technology research and development system with fully independent intellectual property rights, with senior and intermediate technical personnel accounting for 30% of the total employees. We also hold more than 20 technological invention patents and have been awarded the title of "Shanghai High-tech Enterprise." Our products are distributed nationwide and exported to countries such as France, Italy, Russia, and India. Among them, remote transmission density relays have accumulated sales of over 40,000 units to date, ranking first in the industry. The company has also established good cooperative relationships with world-renowned multinational corporations such as ABB, ALSTOM, SCHNEIDER, SIEMENS, as well as well-known domestic enterprises including Taikai, Pinggao, Xikai, Beikai, and Shenkai.