Also BioNomadix Wireless Wearable Physiology is limited to indoor use, since it requires a wifi connection to a recorder.
The Equivital’s wireless physiological monitoring system has also a data logger included:
Getting Started with Equivital | ADInstruments
Warranty time for the Equivital is limited to a view month. Is this satisfactory for a device in this price range? And has this to do with the large number of sensors, which are sensitive, and are packed all in one device?
If we start a new area of research, something which no one has ever done before, it is probably inevitable that we start developing devices ourselves.
Bionomadics and Evital are probably not devices for daily use, but should be suitable as reference validation devices.