Aister Instrument Factory has many years of independent research and development, design and production experience in water flow standard devices. It can precisely calibrate various velocity flowmeters, volumetric flowmeters, mass flowmeters, etc. with diameters ranging from DN10 to DN800.

Aister Instrument Factory has many years of independent research and development, design and production experience in sonic nozzle gas flow calibration devices. It can accurately calibrate various types of turbine flowmeters, vortex flowmeters, Roots flowmeters, volumetric flowmeters, velocity flowmeters, etc. with diameters ranging from DN15 to DN800.