MindWare's Impedance Cardiograph and GSC 2 Amplifier can be used to measure impedance cardiography, skin conductance, and other physiology signals. It measures ECG, Z0 (thoracic impedance), dZ/dt and GSC (Galvanic Skin Conductance). This unit is perfect for research studies that require sympathetic, parasympathetic and cardiac function measures. This is the second-generation amplifier that features improve signal clarity to greatly improve your ability to identify the morphology critical for an accruate assessment of sympathetic control. This amplifier is interchangeable between any of the BioNex models.