sp4m - maximum accuracy single point load cell: available in c6 quality the sp4m single point load cells are now available as the successors to the successful sp4 series for maximum capacities from 1 kg up to 200 kg. the major innovation: the load cells now also offer c6 quality and therefore maximum measurement accuracy. however, a lot has been done with regard to the c3 quality models too: a broad choice of options ensures maximum flexibility.