Research on Volume Measurement System of Weight Below 100 g

Buoyancy correction of air for weight volume is very important in the mass measurement. Traditional hydrostatic method for measuring weight volume is the most accurate method currently, but it is a complicated process requiring the weight to be wetted in a reference fluid. To eliminate the influence of liquid against weight mass in the determination of weight volume of the hydrostatic method, the measurement method of weight volume based on acoustic method is presented in the paper. According to the principle of sound voltage balance, the measurement system of weight volume is designed for measuring the weight volume. The results from 10 g to 100 g show accuracy of the measurement system is enough to measuring volume of class E weight. The relative extend uncertainty of system is less than 36.7×10^-4.