Keysight EPM Series Dual-Channel Power Meter. These power meters offer a measurement speed of up to 400 readings/second for fast, accurate average power measurements, and come with the industry’s first color LCD screen in an average power meter, allowing you to view and analyze test data more easily. A noteworthy enhancement from the conventional dual-channel power meter, EPM Series power meter enables four-channel power measurement by connecting U2000 Series USB power sensors via optional USB host. Connect U2000 Series USB power sensors to the EPM Series power meters via the optional USB hosts and get up four channels for power measurements.