Yueqing Londer Electronic Instrument Co., Ltd was established in 1983 and specializes in the production of industrial temperature instruments such as thermocouples, resistance thermometers, integrated temperature transmitters, and bimetal thermometers. The company has been dedicated to the development of temperature instruments and has become one of the most influential private enterprises in the temperature instrument industry in mainland China. Yueqing Londer is a supplier to various units including Sinopec, PetroChina, CNOOC, Shell, Rongsheng Petrochemical, Hengli Petrochemical, CSPC, Zhejiang Energy, China Chemical Group, SEI, Huanqiu Contracting&Engineering, CPECC, Kunlun Engineering, Wison Engineering, East China Engineering and so on. The company is also a member of the China Instrument and Instrumentation Industry Association and the China Petroleum and Chemical Automation Application Association.

Yueqing Londer has obtained ISO9001/14001/45001 certification. The products have obtained a full range of explosion-proof certificates and CCC certification, as well as SIL2 safety certification. In addition, it has also obtained ISO10012 measurement system certification of AAA class and ISO3834 certification. The company has obtained more than 30 patents, including patents for multi-point flexible thermocouples, COT surface thermocouples, COT special thermocouples for cracking furnaces,anti-erosion thermocouple sleeves, thermocouples with leak-proof and pressure-resistant devices, wear-resistant thermocouples, high-pressure thermocouples, and high-temperature sealing components for Tsinghua or Jinhua furnaces. In 1995, the company won the China Patent Ten-Year Achievement Exhibition Gold Award, and its COT thermocouples for cracking furnaces and multi-point flexible thermocouples obtained invention patents.

In 2004, the company established a complete set of "formula programs for calculating the frequency of tube resonance" and provided strength and frequency calculation books for each tube according to the ANSI/ASME PTC19.3 standard before production, taking responsibility for the correctness of the calculation results to ensure the safe use of supplied products.

The company has professional production capabilities for the following products: COT thermocouples and sleeves for ethylene cracking furnaces, COT surface thermocouples, multi-point flexible thermocouples, single-supported multi-point special armored thermocouples (capable of producing 40 temperature measurement points in a single support), high-temperature thermocouples, high-pressure thermocouples (resistance thermometers), special thermocouples for Tsinghua furnaces/Jinhua furnaces/gasification furnaces, surface thermocouples, wear-resistant thermocouples (resistance thermometers),power plant bed temperature thermocouples, low-temperature resistance thermometers, low-temperature thermocouples, oil-resistant resistance thermometers for units and bearing bushes, end-face resistance thermometers, bimetal thermometers, detection cables, pressure class Class75~Class2500 flanges of various specifications, temperature gauge sleeves of various specifications, various threaded joints, various specifications of armored thermocouples, armored resistance thermometer temperature sensing elements, thermocouple compensation wires, etc. The research and application of "Development and Application of Special Thermocouples for Cracking Furnace Outlet Temperature (COT)" has been approved by technical achievements and won the second prize of the 2014 Petroleum and Chemical Automation Industry Science and Technology Award.

Yueqing Londer sincerely thanks the friends from all walks of life who care, support, and help the development of our company. The company will always adhere to the quality policy of "advanced performance, complete and unique varieties, constantly striving for superior quality, and sharing benefits with customers" on the basis of the current situation, continuously improve product quality, and aim to take the enterprise to a higher level. We will provide high-quality products and satisfactory services to our customers, work hand in hand with everyone, and achieve win-win cooperation.