Yonglida QSJ frequency modulated dispersing machine is a frequency modulated paint dispersing machine with a motor power of 750W. It is mainly suitable for coating dispersion tests to evenly disperse solid materials in liquids. The impeller diameter of the QSJ frequency modulated disperser is Φ50mm, and the dispersing barrel volume is 2L.

| model | QSJ-III | QSJ-II | |
| electric motor | 750W 220V 50Hz | 550W 220V 50Hz | 2200W 220V 50Hz |
| Speed âârange | 0~6000r/min | 0~7500r/min | Up to 2200~2400r/min |
| Diameter of impeller | Φ50mm | Φ50mm | - |
| Dispersion barrel volume | 2L | 1.2L | - |
| Lifting stroke | 200mm | 200mm | - |