How do Sample Dividers work?
A sample divider reduces a large sample to a smaller one that has the same composition as the original. Riffle dividers pour material through a series of alternating chutes that direct it into two equal trays, and the process is repeated until the required mass remains. Rotary dividers feed material onto a rotating cone or disc so that particles are distributed evenly around collection vessels in turn. Slurry dividers split flowing suspensions using chutes, cutters or rotating scoops. Vibratory dividers spread the material in a uniform layer before splitting. Because division depends on the geometry of the device rather than on manual selection, bias is reduced and reproducibility is improved.
Which Sample Dividers variants are available?
- Riffle Sample Divider — A riffle sample divider pours material through alternating chutes into two equal trays.
- Rotary Sample Divider — A rotary sample divider feeds material onto a spinning cone or disc that distributes it evenly among collection vessels.
- Slurry Sample Divider — A slurry sample divider splits flowing suspensions into equal portions without allowing solids to settle.
- Vibratory Sample Divider — A vibratory sample divider spreads cohesive or fine material into a uniform layer before splitting it.
- Automated Sample Divider — An automated sample divider performs feeding, splitting and collection under program control.
How do I choose the right variant?
Choose a divider according to the sample form and mass. Riffle dividers suit free-flowing dry powders and granules and are simple and reliable, but they must not be overloaded or the chutes will bias the split. Rotary dividers handle larger masses and are less sensitive to particle size, and they can be automated. Slurry dividers suit suspensions and process streams where the sample must be split while flowing. Vibratory dividers spread cohesive or fine material so that a uniform layer is fed to the splitter. Confirm the feed size the divider accepts, the dividing ratio, whether the sample is dry or wet, and the required throughput. The device should be easy to clean to avoid cross-contamination.
Where are Sample Dividers used?
Sample Dividers are specified in mining and ore sample splitting, agricultural soil and grain sampling, cement, aggregate and mineral analysis and environmental and waste sample preparation.
Which standards and certifications apply?
Work with Sample Dividers is commonly governed by ISO 3310-1, ASTM E11, ISO 6497, ISO 2591-1 and IEC 61010-1. Instrument certifications such as CE marking are confirmed per configuration and never assumed.
What are the key considerations before purchase?
Reduce particle size and mix the sample before dividing, because a divider cannot make a non-uniform sample representative. Feed at a controlled, even rate and do not overload the device, since excess material causes uneven splitting. Repeat the division in stages to reach the required mass rather than trying to split too far in one pass. Clean the divider thoroughly between samples, and use inert or easily cleaned materials where trace analysis is involved. Verify the performance of the device by dividing a sample and checking that replicate sub-samples give consistent analytical results, and record the procedure in the method.
