Beta gauges

Beta-Transmission - Measurement of basis weight, thickness & density

The intensity of beta rays is weakened according to the mass of the penetrated layer. This weakening allows determining the basis weight of nearly all materials. Different isotopes (Krypton, Strontium, Promethium) are used for different weight ranges. With coating processes, the application quantity can be determined as weight difference using several sensors.

Except for very low weight ranges, beta transmission is the universal method for measuring basis weight. However, certain radiation protection requirements must be complied with due to the weak radioactive isotopes.

The density of the product web can also be determined in combination with thickness sensors. If the density of the measured product is known, however, and remains constant, the material thickness can also be  determined via the basis weight.

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    Sensor Gravimat DFI for basis weight / thickness

    Gravimat FMI/DFI

    Measurement of basis weight (mass per unit area) / thickness /density

    DensityThicknessBasis weight

    Transmission of beta rays

    The weight monitoring and control system measures the weight continuously, without contact, destruction-free and on moving product. The measurement is based on the…

    Basis weight sensor Gravimat FMI

    Gravimat FMI

    Control of basis weight / thickness

    ThicknessBasis weight

    Transmission of beta rays

    The weight monitoring and control system measures the weight continuously, without contact, destruction-free and on moving product. The measurement is based on the…