Chengde Longzhida has independent intellectual property rights. The calorimeter verification device produced by Chengde has complete functions, stable and reliable performance, and is effectively used by Chengde Metrology and Testing Bureau.

The Chengde Longzhida calorimeter verification device used in Chengde Metrology and Testing is characterized by a large verification range, which solves the problem of inaccurate verification of small flow rates for similar products; the overall structure is reasonable, beautiful and corrosion-resistant; easy to operate, safe and reliable. According to the special requirements of users, the thermal energy meter verification device can be designed and produced to meet the different requirements of various users. Chengde Longzhida heat meter verification device is an ideal choice for heat meter verification devices for heat meter manufacturers, urban heating units, and measurement and testing departments.