2. The spiral rotor has uniform rotation, small vibration and long service life ; 
3. Insensitive to the viscosity number of the liquid under test, especially suitable for the measurement of high viscosity liquid ;
 4. Simple structure, small dimensions and light weight;  5. Easy to install, no need to install straight pipe section in front of the table。
                
                                                
                                                                                            
  
                                                
                                                                                            
  
                                                
                                                                                            
  
                                                
                                                                                            
  
                                                
                                                                                            
  
                                                
                                                                                            








