For instance those from Schiller medical Switzerland:
The HOLTER MEDILOG AR – holter monitor is a 3 channel ECG device
Or the Schiller C200 system wich is a 12-channel ECG device. This system was updated recently to 16 channels as far as we know.
Rob ter Horst currently misses a proof that the results from his tests can be reproduced:
But not the devices from Schiller medical Switzerland which are used worldwide. Schiller devices are also used in India. The SCHILLER’S ANAESTHESIA WORKSTATIONS are the most popular devices on the YouTube channel of Schiller India:
Schiller India is expanding its presence into the field of anaesthesia, introducing life-saving solutions for critical care. The Schiller medical Switzerland Headquater is 20 min by car from the Meditation Research Institute Switzerland (MRIS). Peter Gamma from www.petergamma.org is currently trying to build devices similar to those from Schiller to a fraction of their costs as a private project on his personal website www.petergamma.org. The Schiller C200 system costs up to more than 20 000 USD. But with more recent soft- and hardware components the costs for such devices could reduced.