Which low-cost high-quality multi-physiological sensor devices to choose?

For Peter Gamma from www.petergamma.org the following devices are still interesting: OpenBCI modules imported directly from China: Products bought in the U.S.A. are often associated with high shipping costs an import taxes for Swiss costumers. And after studying the OpenBCI architecture for many years, Peter Gamma from www.petergamma.org supposes that he is able to repair …