Description The E27 current clamp is an insulated current transformer utilizing Hall effect technology to display the shape and amplitude of direct and alternating currents on oscilloscopes. It features two measurement ranges to measure current strengths up to 100 A with a bandwidth of up to 100 kHz. The E27 clamp is powered independently from the mains via batteries or with a 5V standard power supply through a µUSB interface. Additionally, it has an automatic DC zero-point correction and an automatic shutdown feature when not in use. With its 2-meter connection cable and insulated BNC connector, it can be connected to any oscilloscope with standard connection technology. The current clamp can be used for electrical installations in category 600V CAT III and 300V CAT IV. Current strengths: 100 mA to 100 A peak Bandwidth: 100 kHz (-3 dB) Clamp diameter: 11.8 mm.