Samling Systems: Engineering. Manufacturing. Services.

To our main product line counts design, engineering, manufacturing, assembling and installation of automatic sampling systems for bulk materials, such as coal and ore.

With an integrated engineering department and in-house flexible manufacturing capacities, SIGMA offers handling and conveying equipment, components and individual machines according to international standards and individual specifications of clients.

Our in-house capability includes design and engineering, electrical and process control engineering, manufacturing, assembling, installation and commissioning.

Please contact us either using a Customer questionaire below or directly.

Sampling System Components

Modular structured technology

Additional to the customized components we have a system of modular components available,  allowing to combine and adapt the single components according to the project requirements.

We would be glad to support your project with our technical know-how and experience in design, maintenance, repair, retrofitting and spare parts supply for your sampling system.

Overview Modular Components

The sampler is used for the extraction of the pre-defined primary sampling directly from a conveyor belt.

Components: Hammer sampler, bucket-type sampler

Example: The hammer sampler is used for the automatic extraction of a representative sample from the main bulk material stream, transversely to the conveying direction. Depending on the task, the hammer sampler works either separately or as a part of the whole sampling system. The sampling material is extracted by a flap (chute) on the discharge side of the material flow and is transported either to the material stock pile or for further processing. The hammer sampler is designed for troughed conveyor belts.

The dosing conveyor is used to homogenize and dispense the bulk solids for further processing.

Components: belt feeder, metering canal

Example: The belt feeder ensures constant flow of the extracted material sample and regulates feeding of the following components of the sampling system. It is also possible to preset belt speed to achieve constant material stream. The filling level indicator prevents overfill of the following components.

The mill is used for grinding the sample down to the final grain size. Depending on the demanded grain size, it is also possible to use a combination of crushers or mills.

Components: roller mill, hammer crusher, jaw crusher

Example: The roller mill is used for grinding of soft to medium hard raw materials. Two rolls drive independent from each other. The constellation of such parameters as grain size, gap width and roll diameter allows automatic withdrawn and high-pressure crushing of bulk material. The maximal possible division ratio depends on the material characteristics and drive power. Gap adjustment is infinitely variable by turning the clamping spindle. The machine is mechanically and electronically protected against overload caused e.g. by non-crushable pieces.

Divider components dispatch extracted sampling material: the excessive part of the extracted sample falls into the reject chute, an appropriate laboratory sample goes to further processing.

Components: Turnstile divider, rotary tube divider, rotary disc divider

Example: The turnstile divider separate laboratory part from the rejected part according to adjusted division ratio. To achieve more precise division ratio it is possible to place several dividers in a row. The special technical data of our divider allows additional homogenization of sampling material during the dividing process.


The prepared sample is provided in one or more containers for further transportation.

Components: sample carousel, primary sample

Example: The sample collector collects, stores and provides collective samples for laboratory analyses. By rotation of the carousel the containers are moved into the respective position and filled automatically. This means that the samples can be collected from the machine at greater intervals. An optional feature allows monitoring of the filling level. Airtight closure ensures that the sample cannot be changed, neither by external factors nor by loss of humidity of the sample.