When filling or emptying either rigid or flexible intermediate bulk containers, earth monitoring systems may be employed to prevent product transfer unless the earthing cable is in place.  A system with a monitoring range appropriate to the type of container should be selected.  This will normally be up to 10 Ohms for rigid IBCs or drums and up to 1 x 10^8 Ohms (100 Megohm) for Type 'C' FIBCs or static-dissipative liners.

CLC/TR 50404 states that:  the conductive fabric and the conductive threads (including the handles) shall have a resistance to the earthing point on the FIBC of less than 1 x 10^8 Ohms ......  In order to prevent spark discharges, the FIBC Type C shall be properly earthed whenever being filled or emptied.  (7.2.6.8.3).

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