Industrial Implementation Company „WILPO“ Ltd.

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Radiometric ash meter WILPO C 512

The application

The WILPO C 512 Radiometric Ash Meter is designed for continuous determination of ash content made directly on hard coals and lignite of various grain sizes and layer thickness carried on a conveyor belt of any width.

The innovative, radiation scattering and absorption measurement method applied in this ash meter enables measurements to be made on conveyor belts with steel cords, which is a complete novelty. This makes the ash meter a preferred choice for use on long and open conveyor lines, particularly in open cast mines.



The WILPO C 512 Ash Meter comprises two main units: measuring unit and readout unit. The measuring unit consists of a supporting structure, radiation head with dedicated Am 241 gamma radiation source, appropriately positioned detection heads and electronic system. The supporting structure dimensions depend on the size and type of the belt conveyor.

The basic component of the readout unit is a computer with dedicated software for carrying out various measuring functions, display of results (in numerical and graphical form), data recording and transmission to indicated recipients, e.g. to a control room.


Measurement unit of WILPO C 512 Ash Meter, where:

  • 1 – isotope head
  • 2 – measurement head (scatter)
  • 3 – measurement head (absorption)
  • 4 – layer thickness detector
  • 5 – support
  • 6 – controller unit


Coal type:

hard coal and lignite,

Coal grain size:

0 – 300 mm,

Coal layer thickness:

min. 100 mm (measurement start), max. 500 mm (up to 750 mm momentarily),

Conveyor belts:

plain, multi-layer and with steel cords,

Gamma radiation source:

Am 241 (shielded, special form, activity selected within the range of 3.7 to 37 GBq),

Ash content determination accuracy (σ):
within 0 – 15% Ar
within 15 – 30% Ar
within 30% Ar


Rated supply voltage UN:

230V, 50 Hz,

Power consumption:

300 VA.

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„WILPO“ Ltd.