Technologies are disclosed herein for a low impedance detection system. The detection system includes an electrical insulation and an impedance measurement device. The impedance measurement device can be used to test the impedance of the system when the barrier is placed between the user of the barrier and a source of electrical power. In a defibrillation system, a rescuer can place the barrier over the patient. An electrical power source can deliver electrical shocks to the patient. The impedance measurement device can monitor impedances of the system across various frequencies to detect electrical conditions that might be harmful to the rescuer.
