In recent decades, many researchers at home and abroad have carried out research on micro flowmeters and have achieved extensive results. However, the current domestic micro-flow standard devices are rarely used for the calibration and calibration of local measurement institutes. The plunger-type liquid micro flow calibration device developed by the Zhejiang Institute of Metrology can calibrate the float flowmeter, Coriolis and thermal mass flowmeters and infusion pump testers with calibration flow ranges from 0.1mL/h to 1000mL/h.

The project uses a "double cup double weigh" and "double cup inside and outside" frame and a constant temperature water source system to electrically drive the plunger to provide a flow source and a measurement standard to achieve dynamic verification and calibration. The device verification efficiency has reached or exceeded the international level The overall technology of the project is leading domestically. The project-related technology obtained 4 national invention patents and 8 academic papers.

Zhejiang Provincial Metrology Institute has applied the results of the project to provide professional measurement and calibration services, which effectively solves the problem of traceability of the value of nearly 100 infusion pump testers in hospitals across the province, and provides a measurement basis for biomedical, high-tech, environmental protection and other fields. Standards and technical support have significant social benefits.

(Original Title: Provincial Scientific Research Institute won the third prize for provincial science and technology progress)