GSR Galvanic Skin Response Module Current Sensor Kit V2.0

GSR Galvanic Skin Response Sensor Module

Product Description

The GSR (Galvanic Skin Response) Sensor Module is a compact physiological sensing module designed to measure changes in skin conductance caused by variations in sweat gland activity. It is commonly used for detecting electrodermal activity (EDA), making it suitable for biofeedback systems, educational experiments, psychological research, stress-monitoring projects, and human-machine interaction applications.

The sensor works by measuring the electrical conductance between two points of the skin. When a person experiences emotional or physical arousal, sweat gland activity can increase, causing the skin to become more conductive. The module detects these subtle changes and provides an analog output that can be read by compatible microcontrollers.

This updated version features improved sensitivity and more stable performance compared with earlier versions, making it suitable for projects that require continuous monitoring of changes in skin conductance.

The compact design, low current consumption, and simple analog interface make the GSR module suitable for integration with Arduino, ESP32, and other 3.3V–5V microcontroller platforms.

Features

• GSR / Galvanic Skin Response sensing
• Measures changes in skin conductance
• Analog conductance output
• High sensitivity for detecting small conductance changes
• Improved measurement stability
• Low working current of approximately 1mA
• Supports 3.3V–5V DC operation
• Compatible with Arduino and ESP32
• Suitable for biofeedback applications
• Compact and lightweight design
• Suitable for educational and research projects
• Useful for stress and arousal monitoring experiments
• Includes finger electrodes/leads
• Simple interface for microcontroller-based projects

Specifications

Design and Construction

The GSR Sensor Module features a compact PCB design intended for easy integration into electronic and physiological monitoring projects.

Its small 34mm × 25mm footprint makes it suitable for portable prototypes, wearable experiments, educational devices, and embedded applications where PCB space is limited.

The module is designed to work with a pair of finger electrodes/leads that are placed in contact with the user’s skin. The electrodes allow the module to measure changes in electrical conductance associated with variations in skin moisture and sweat gland activity.

With a lightweight construction of approximately 4g, the module can be incorporated into experimental setups without adding significant weight.

Working Principle

The GSR module operates by measuring the electrical conductance of the skin between two electrodes.

When the skin is relatively dry, its electrical conductance is generally lower. During periods of increased emotional or physical arousal, sweat gland activity can increase, causing changes in skin conductivity.

The module detects these changes and provides an analog signal that can be connected to an ADC input of a microcontroller such as an Arduino or ESP32.

The microcontroller can then process the sensor readings to monitor changes in electrodermal activity and use the information in applications such as biofeedback, educational demonstrations, and physiological experiments.

Sensor Interface

The GSR module provides an analog sensing interface that can be connected to compatible microcontrollers.

Analog Output

The analog output can be connected to an ADC input of a microcontroller to measure changes in the sensor signal.

Finger Electrodes

The supplied electrodes/leads are used to establish electrical contact with the skin. The electrodes should be positioned appropriately on the fingers to obtain consistent measurements.

Microcontroller Compatibility

The module can be integrated with:

• Arduino boards
• ESP32 development boards
• Other 3.3V–5V microcontrollers
• ADC-based data acquisition systems

Physiological Sensing

The GSR sensor provides a simple way to observe changes in electrodermal activity (EDA).

Changes in skin conductance can occur in response to different forms of physiological or emotional arousal. Because of this, GSR measurements can be used as an input for systems designed to study or respond to changes in human physiological activity.

The sensor should be considered a measurement tool for skin conductance changes, rather than a standalone diagnostic device.

Typical Application Scenarios

Biofeedback Systems

The module can be used to develop systems that monitor changes in skin conductance and provide feedback to users.

Educational Projects

Suitable for demonstrating the relationship between physiological activity and changes in electrical skin conductance in science and electronics projects.

Psychological Research

Can be integrated into controlled experiments involving electrodermal activity and physiological response monitoring.

Stress Monitoring

The sensor can be used as one input in experimental systems designed to observe changes in physiological arousal associated with stressful situations.

Human-Machine Interface

GSR measurements can be incorporated into interactive systems, robotics, installations, and experimental interfaces that respond to physiological signals.

Applications

• Galvanic skin response monitoring
• Electrodermal activity experiments
• Biofeedback systems
• Stress-monitoring projects
• Psychological research
• Physiological experiments
• Educational electronics projects
• Arduino GSR projects
• ESP32 GSR projects
• Human-machine interfaces
• Interactive robotics
• Wearable prototypes
• Emotional-response experiments
• Science fair projects
• Physiological data acquisition
• Research and development projects

Package Includes

• 1 × GSR Galvanic Skin Response Sensor Module
• 1 × Set of Finger Electrodes / Leads

Product Disclaimer

Product images are shown for illustrative and representational purposes only. The actual module may vary slightly in PCB colour, component placement, connector design, or other visual details depending on the manufacturing batch.

Product specifications are provided based on available product information and may vary between manufacturers or production versions. Please verify the actual module specifications before integrating it into a critical application.

The GSR module is intended for educational, experimental, research, and personal-use applications. GSR readings can be affected by electrode placement, skin condition, movement, environmental conditions, and individual physiological differences.

This module should not be considered a medical diagnostic device.

Important Note

Connection Safety

The positive and negative poles of the power supply must be connected correctly. Reverse polarity may cause permanent damage to the module.

ADC Compatibility

When connecting the analog output to a microcontroller, ensure that the ADC input is compatible with the module’s output voltage range. For ESP32 applications, particular attention should be given to the ADC input range and appropriate calibration.

Electrode Placement

For more consistent readings, ensure that the electrodes have proper contact with the skin and remain in a relatively stable position during measurements.

Measurement Considerations

GSR readings represent changes in skin conductance and can vary between individuals. The sensor should therefore be used primarily for observing relative changes rather than assuming that a single reading represents a specific emotional or physiological state.