Galvanic Skin Response (GSR) Amp for Electrodermal Activity

Overview

A fully isolated galvanic skin response (GSR) amplifier with low voltage, 75 Hz AC excitation and automatic zeroing. The GSR equipment is designed to work with a C Series Front End Interface or traditional PowerLab data acquisition system to measure human GSR, now known as electrodermal activity (EDA). The low-voltage AC excitation reduces the electrode polarization artifacts found in DC systems.

Included with the GSR Amp:

GSR Finger Electrodes (Snap Lead)
- Velcro® straps suitable for adults

Accessories purchased separately:

Features

75 Hz oscillator which supplies a near square wave, low-impedance, low-voltage (22 mV_rms) signal to an electrode on one finger of the subject.
Galvanic isolation for subject safety and approval to the IEC60601-1 standard for human connection as a body protected (BF rated) instrument.
Automatic zeroing
Supplied with GSR Finger Electrodes and adult Velcro® straps

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Details and Tech Specs

Technical

Input

Connection type: 2 × 4 mm (0.16") shrouded banana plugs to custom cable. Two dry, bright-plated, bipolar electrodes with Velcro™ attachment strap suitable for adult fingers.
Excitation: Constant-voltage AC excitation (22 mV_rms @75 Hz)
Current density: ≤0.5 μA cm^–2
Safety: Approved to IEC60601-1 BF (body protection) standard
Input isolation: Transformer isolation (AC bridge operation)
Isolation rating: 4000 V AC_rms for 1 minute
Amplification ranges: 1 to 40 μS full scale in 6 steps (combined PowerLab and GSR Amp)

0 to 40 μS
0 to 20 μS
0 to 10 μS
0 to 4 μS
0 to 2 μS
0 to 1 μS

Frequency response: –3 dB at 1 Hz
Accuracy: ±5 %
Input leakage current: <3 μA_rms at 240V, 50 Hz <2 μA_rms at 120V, 60 Hz
Zeroing and offset: Automatic software-controlled fast zeroing, controlled by internal 12-bit DAC; resolution = ±0.2 μS

Output

Analog signal: ±2 V full scale

Control Port

I²C port: Provides control and power. Interface communications rate of ~50 Kbits/s.

Physical Configuration

Dimensions (h × w × d): 55 mm × 120 mm × 260 mm (2.2" × 4.7" × 10.2")
Weight:1.2 kg (1 lb 10.5 oz)
Power requirements: 2.5 W maximum
Operating temperature range: 5 to 35 °C, 0 to 90% humidity (noncondensing)

ADInstruments reserves the right to alter these specifications at any time.

Product Code

FE116

GSR Amp

bftype
ce

Manuals

Compatibility

FE116

	Operating System	Recommended Hardware	Alternate Hardware
LabChart Lightning	Mac/Windows	PowerLab C + Front End Interface	Traditional PowerLab
LabChart 8	Mac/Windows	PowerLab C + Front End Interface	Traditional PowerLab