Hardware Specifications

Empatica E4 EDA/GSR Wristband

The E4 wristband is designed for researchers and physicians who are conducting research on physiology in daily life and is not for consumer use. It is flexible with tools for data recording and management as well as real-time streaming to the Empatica Realtime App both for Android and for iOS. It is also possible to measure PPG with the E4 in order to conduct Heart Rate Variability (HRV) studies.

The Empatica E4 EDA/GSR Wristband is compatible with the iMotions EDA/GSR Module.

Electrodermal Activity (EDA/GSR) Wristband
Model
E4 EDA/GSR Wristband
Sampling frequency
EDA: 4 Hz (non-customizable); PPG: 64 Hz (non-customizable)
Resolution
EDA: 1 digit ~900 pSiemens; PPG output: 0.9 nW / digit
Range
0.01 μSiemens – 100 μSiemens
Electrodes
Semi-permanent (screw in design); SUS03 stainless steel (standard) or Silver (Ag) plated with a metallic core
Electrode longevity
Lifetime (SUS03), 4–6 months (Ag)
Flash memory
Up to 60h of data storage
Data transfer
Bluetooth / USB 2.0
LEDs
Green (2 LEDs), Red (2 LEDs)
Sensor output
Blood volume pulse (BVP)
Motion artifact removal algorithm
Combines different light wavelengths; Tolerates external lighting conditions
Dimensions
Case: 44x40x16 mm; Wrist: 110 - 190 mm
Weight
25 g
Medically certified
No
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The iMotions EDA/GSR Module

Main features

The iMotions Electrodermal Activity / Galvanic Skin Response Module seamlessly integrates wired and wireless EDA /GSR devices from Shimmer, BIOPAC, and Empatica, so that you can conduct studies in both lab-based or real world settings, according to your chosen stimuli. The software allows you to easily quantify these moments of significant, increased arousal through automated peak detection and easy exporting of raw data, metrics, and visualizations.