High quality InAs/Al0.2Ga0.8Sb quantum well structures were grown on Germanium substrates by molecular beam epitaxy. The excellent transport properties resulted in sensitivities of 0.85T(-1) (voltage drive) and 370 V/A/T (current drive) for a cross-shaped sensor at room temperature. The results show that the performance of Hall sensors on germanium and on GaAs substrates is comparable in terms of sensitivity and temperature stability.