A Van der Pauw electrolytic conductivimeter was development to calibrate an electrical resistivity probe. This conductivimeter is used in studies of early cancer screening because such studies require a measurement probe, i.e., tetra-polar probe, which needs to be calibrated. The standard calibration procedure uses electrolytic solutions of known electrical conductivities. The development Van der Pauw electrolytic conductivimeter should be used as primary standard in the probe calibration. A maximum measurements uncertainty of 1.64% was achieved.