1.Measurement of simple: made of plexiglass, mounted on the upper part of the instrument, the volume of about 600ml, marked with a scale on the resolution of 2ml, in the 100m and 500m at the coarse marking line 

2.Receiver: connecting the volume of simple and base, the center is equipped with a stainless steel valve, used for experiments on and off 

3.Base: the inner diameter of the lower opening: Φ150mm, outer diameter: Φ220mm. 

4.Support: composed of column and top plate. 

5.Counterweight: four pieces, each piece is about 2.5kg.