Consultation hotline
Social responsibility
Contact Us
Hotline: After-sales installation: 
Product inquiry purchase: After-sales maintenance: 
Address: Social responsibility
Industry Applications and Positive User Feedback
Chengde Longzhida Intelligent Instruments & Meter Technology Co., Ltd. (formerly Xinlong Electronics) was one of the 14 key enterprises in Hebei Province’s electronic systems and a specialized, designated manufacturer under the former Ministry of Electronic Industry. Over the years, the company has collaborated with universities including Peking University, Tsinghua University, Beijing University of Aeronautics and Astronautics, Tianjin University, and Chengde Petroleum University on joint research and development projects. As a result, it has developed products such as remotely transmitted heat meters and water meters with independent intellectual property rights, remote monitoring and fault diagnosis systems for civil instruments, intelligent constant-temperature and constant-pressure mixing equipment, non-negative-pressure water supply equipment, wireless data collection systems for water, electricity, and heat, and PE pipe products. Thanks to their high technological content, ease of use, reliability, and remarkable energy- and water-saving performance, these products have earned widespread acclaim from hundreds of schools and thousands of users across China.
1. Qingdao Huiquan Bay Seaside Bathing Beach
Chengde Longzhida Intelligent Instruments & Meter Technology Co., Ltd. has successfully implemented an integrated project for the construction of induction shower systems in collaboration with Qingdao Huiquanwan Development Company. The Chengde Longzhida intelligent induction shower features stable performance, strong anti-interference capability, long service life, easy installation, and a wide range of applications. It delivers smart, convenient, energy-saving, water-efficient, and automated control and management.
2. Taiyuan Iron and Steel Group Corporation
Chengde Longzhida Intelligent Mixing Valve has successfully completed the construction and integration project of the constant-temperature and constant-pressure mixing valve system for Taiyuan Iron and Steel Group Company. This project utilized our company’s HSZ series of constant-temperature and constant-pressure mixing equipment. This intelligent mixing valve series employs microcomputer control technology and utilizes temperature sensors to provide feedback, thereby controlling solenoid valves to automatically adjust the outlet water temperature. The equipment features precise readings, low cost, easy installation, guaranteed quality, and high intelligence. It offers automatic water temperature control, helping to conserve water and energy while ensuring stable, constant-temperature and constant-pressure water supply. Chengde Longzhida’s intelligent mixing equipment is widely used in industrial and mining enterprises and has received unanimous praise from customers.
3. Donghua University, Shanghai
Chengde Longzhida Intelligent Instrument & Meter Technology Co., Ltd. has successfully implemented an integrated engineering project for induction shower units in collaboration with Qingdao Huiquanwan Development Company. The induction shower unit boasts stable product performance, strong anti-interference capability, long service life, simple installation, and a wide range of applications. It achieves intelligent operation, convenience, energy and water savings, as well as automated control and management.
4. Texas College Campus
As Dezhou College’s campus one-card system continues to evolve toward greater socialization, informatization, and scientific management, the Chengde Longzhida campus one-card solution has emerged accordingly. At Dezhou College, the Chengde Longzhida campus one-card system has been successfully implemented and has achieved remarkable results.
5. Shandong University of Technology
The intelligent flushing system for smart restrooms developed by Shandong University of Technology—specifically the Chengde Longzhida intelligent flusher—adopts either the infrared reflection principle or the human body thermal infrared detection principle to automatically control water discharge. It is easy to install and use, safe and reliable, boasts a long service life, and features intelligent automatic control. Ultimately, it helps conserve water, making it a wise choice for public venues and campuses seeking energy efficiency, water conservation, and environmental protection.
6. Beijing University of Chinese Medicine
The card-based smart shower system developed by Chengde Longzhida Smart Instruments & Meter Technology Co., Ltd. has been successfully implemented at Beijing University of Chinese Medicine.
7. Tsinghua University, Beijing
The company has actively researched and successfully developed a series of contactless IC card products—including IC-based water controllers, water meters, electricity meters, gas meters, and heat meters. The application of IC-card smart water meters, with Tsinghua University serving as a successful case study, has received unanimous praise from relevant leaders at Tsinghua University. Chengde Longzhida water meters are widely used on campus and have established a strong market presence in the smart meter sector. The success of the Tsinghua case not only demonstrates the success of IC-card smart water meters but also serves as a testament to the strength and capabilities of Chengde Longzhida.
Longzhida Company Successfully Hosted the Victory Parade Commemorating the War of Resistance.
Longzhida Company Successfully Hosted the Victory Parade Commemorating the War of Resistance.
Today is a day that every Chinese person should solemnly remember—the 80th anniversary of the victory of the Chinese People’s War of Resistance Against Japanese Aggression and the World Anti-Fascist War.
On July 2, Chengde Longzhida Company held a meeting with the Sino-German Institute. After thorough discussions between the two sides, Mr. Bai, General Manager of Longzhida Company, and the faculty team from the Sino-German Institute reached a consensus: Longzhida Company officially entrusted the Sino-German Institute to carry out the design and R&D work for a new type of ultrasonic water meter.
On May 30, Longzhida Company successfully held an exceptionally meaningful event titled “Welcoming the Eighth ‘National Science and Technology Workers’ Day’: Promoting the Spirit of Scientists.”
Contact Us
Add：No.3, longzhida Road, electronic industrial park, high tech Industrial Development Zone, Chengde City, Hebei Province
Hotline: +86-15930084101
After-sales installation: +86-314-7018122
Product inquiry purchase: +86-314-2078138
After-sales maintenance: +86-314-7018122
E-mail: 310540860@qq.com
Website: www.cdlong.com
Enter mobile website