Last Updated on September 22, 2022 by pg@petergamma.org
We requested specifications from Adinstruments about the Adinstruments Equivital. Here the information whe received from Adinstruments:
«The Equivital setup is a research application and therefore already designed for research purposes per se. It is used in various contexts (exercise physiology, sleep studies, etc.). Below we will send you an overview data sheet with further information about the system»:
The A/D sampling rate of the Equifital by Adinstruments is reported by Adinstruments as 10 bit. Bitalino has an ECG sampling rate between 10-12 bit, depending on the channel, Schiller Medilog Holter ECG has 12 bit, iWorx channel recorders have 16 bit, g.Nautilus devices have 24 bit, research grade devices usually have 16 bit (information from Bitalino). But there are several validation papers which compared for instance the accuracy of ECG from Bitalino to devices with a higher sampling rate. The accuracy differences where low.
Adinstruments and Equivital make different statements about noisy ECG signals, which occur for instance during sporting acitivities:
Equivital:
« 2 Leads of 256Hz ECG: Allows multichannel processing and reduction in noise from the ambulatory signal»
Adinstruments:
«Noise and movement artifact-free ECG»
Adinstruments uses Adinstruments LabChart software, Equivital does not use LabChart software. We suppose that the feature which results in a noise and movement artifact-free ECG is only implemented in the Adinstruments LabChart software, but not in the Equvital software.
comparison table: