The splitting of primary samples is one of the

"bloody problem" of the sampling procedure.

We had tried many existing devices but could

not find the splitter we looked for - compact,

representative, reliable,dust free and

low maintenance.

After all we built the principially new splitter.

A primary sample enters very short (! ) screw

feeder . Each revolution of the screw moves

forward new portion of a material and the

special device automatically takes from this

portion one very small sub-increment.

Important that the sub-increments are taken

not (! ) from the bottom of the feeder.

The theory shows that even each

sub-increment has relatively low

representativeness, the certain number of them

forms highly representative sample.

The sampler equipped with the new splitter

has been operating since 1985.

No technical problems were observed.

This splitter can be used separately in every

laboratory. ■