Electrodermal Activity (EDA)
Sensor Datasheet

EMG 03092020

SPECIFICATIONS> Range: 0-25µ𝑆 (@VCC=3V)> Bandwidth: 0-3Hz> Consumption: ±0.1mA> Input Bias Current: ±70pA> CMRR: 130dB> Measurement: continuous> Current: DC
FEATURES> Skin resistance measurement> Unobtrusive & lightweight sensor> Pre-conditioned analog output> High signal-to-noise ratio> Ready-to-use form-factor> Medical-grade raw data output
APPLICATIONS> Life sciences studies> Sympathetic nervous system monitoring> Human-Computer Interaction> Affective computing> Psychophysiology> Biomedical device prototyping> Arousal detection> Emotional cartography> Physiology studies> Relaxation biofeedback
GENERAL DESCRIPTION
The biosignalsplux EDA sensor is capable ofaccurately measuring the electrical propertiesof the skin which changes. These changes arecaused by alterations in sweat secretion andsweat gland activity as a result of changing
sympathetic nervous system activity. The lownoise signal conditioning and amplification
circuit design provide optimal performance inthe detection of even the most feeble
electrodermal skin response events.

Fig. 1. BIOSIGNALSPLUX EDA SENSOR (STANDARDVERSION).

Fig. 2. Typical raw EDA data (acquired withbiosignalsplux).

Fig. 3. Example EDA placement on the index and middle
finger.

APPLICATION NOTESThe biosignalsplux EDA sensor is designed toacquire the change of skin activity such as
sweat with two measuring electrodes. One
example is the placement of the electrodes on
the anterior side of the hand on two adjacent
PLUX – Wireless Biosignals, S.A.
Av. 5 de Outubro, n. 70 – 2.
1050-059 Lisbon, Portugalplux@plux.info
http://biosignalsplux.com/
REV B© 2020 PLUXThis information is provided "as is," and we make no express or implied warranties whatsoever with respect to functionality, operability, use,
fitness for a particular purpose, or infringement of rights. We expressly disclaim any liability whatsoever for any direct, indirect, consequential,incidental or special damages, including, without limitation, lost revenues, lost profits, losses resulting from business interruption or loss of data,
regardless of the form of action or legal theory under which the liability may be asserted, even if advised of the possibility of such damages.

Electrodermal Activity (EDA)
Sensor Data Sheet

EMG 0309202

fingers of interest (see Fig. 3). The electrodes
are then connected to the sensor cable of the
EDA sensor.

TRANSFER FUNCTION[0µS, 25µS]

𝐴𝐷𝐶
𝑛 × 𝑉𝐶𝐶
𝐸𝐷𝐴(µ𝑆) = 2
0.12
𝐸𝐷𝐴(𝑆) = 𝐸𝐷𝐴(µ𝑆) × 1 × 10−6
𝑉𝐶𝐶 = 3𝑉 (operating voltage)
𝐸𝐷𝐴(µ𝑆) – EDA value in microsiemens (µS)
𝐸𝐷𝐴(𝑆) – EDA value in in siemens (S)𝐴𝐷𝐶 – Value sampled from the channel
𝑛 – Number of bits of the channel1

ELECTRODE CONNECTIONSElectrode Cable
Sleeve Color+RedBlackPHYSICAL CHARACTERISTICS> W1 x L1 x H1:
1.6x2.2x0.5cm> W2 x L2 x H2: 1.5x1.75x0.55cm
> W3:
0.9cm
> L3:0.5cm> A1:
105.0±0.5cm> A2:
5.0±0.5cm> A3:
5.0±0.5cm> D:0.4cm> Available sleeve colors:
White, Black, Blue, Green, Red, Yellow, Gray, and Brown> Weight:
13g

1 The number of bits for each channel depends on the resolution of the Analog-to-Digital

Converter (ADC); in biosignalsplux the default is 16-bit resolution (n=16), although 12-bit(n=12) and 8-bit (n=8) may also be found.

PAGE 2 OF 3

Electrodermal Activity (EDA)Sensor Data Sheet

EMG 0309202

Figure 1: Physical characteristics of the standard Electrodermal Activity (EDA) sensor.

ORDERING GUIDE
Reference
SENPRO-EDA1SENPRO-EDA1A1-A2-A3-S

Package Description
Electrodermal Activity (EDA) sensor with standard physicalcharacteristics and a random cable sleeve color
Electrodermal Activity (EDA) sensor built with custom lengths A1, A2
and/or A3 (all in cm), and custom sleeve color S; for standard physicalcharacteristics in A1, A2, A3, or S use 0.
Examples:> EDA1-200-0-0-0: Otherwise all-standard EDA sensor except for a 200cm cable A1> EDA1-0-0-0-Yellow: Otherwise all-standard EDA sensor except for a yellow cablesleeve> EDA 1-50-10-10-Red: Fully custom EDA sensor with a 50cm cable A1, 10cm electrodecables A2 & A3, and a red cable sleeve

PAGE 3 OF 3