Some exploration targets, mostly the ones with long time constants in Time Domain Electromagnetics (TEM), are easier to detect by measuring the magnetic field instead of its time derivative. As a consequence, Superconducting QUantum Interference Devices (SQUIDs) are almost perfectly suited for this task due to their high sensitivity and perfectly flat frequency response. New technologies and read-out schemes for SQUIDs are evolving which enable new EM receivers with highest sensitivity and overcome the limits in terms of slew rate and dynamic range of earlier SQUID instruments.