HT201 Attenuation is designed for assisting automobile measurement. This Attenuation can allow oscilloscope to measure fuel injector and primary ignition waveforms. The Passive Attenuator with 20: 1 attenuation, if input a 20V signal, it can output a 1V signal. Because the is attenuated, by using this item, oscilloscope can measure voltage higher than its range(±20V). When used in an oscilloscope to measure an inductive signal, such as a jet nozzle and a primary ignition, it provides enhanced input overload Don't use it for secondary ignition tests., Manufacturer: Hilitand