Stainless Steel Generator Probes
Rotor stator generator probes are comprised of a tube and collar assembly, shaft, and knife. The rotating knife makes up the rotor portion of the rotor stator generator probe. The tube and collar assembly attaches to the motor housing, but does not spin, and is therefore called the stator.
As the knife spins within the stator, it creates a pumping action which pulls liquid into the open end of the generator probe, and forces the liquid out through windows in the stator portion of the generator probe. The interaction of the knife with these windows sets up a shearing action; much like a pair of scissors might, and thereby works to reduce the particle size of sample being forced through the windows.
The speed differential between the rapidly moving liquid being pumped by the rotating knife, and the relatively stationary liquid which makes up the rest of the sample, sets up a second force, called cavitation. This force literally acts to pull the sample apart, and therefore further reduces particle size.
Constant circulation continues to re-subject the sample to these forces, and therefore further reduces particle size as a function of processing time. A practical limit of minimum particle size is generally determined by the material itself, the processing time, and the spacing between the rotor knife and the stator’s tube and collar.