Agilent 4288A 1 kHz / 1 MHz Capacitance Meter The Keysight 4288A (formerly Agilent Technologies) 1 kHz/1 MHz capacitance meter offers high-speed with reliable measurements for capacitor testing in the production lines. The measurement capabilities of capacitance from low to middle values (up to 20 uF) can be realized with accurate measurements. The 4288A capacitance meter contributes improvements of the test throughput, while attaining excellent component quality for ceramic capacitor testing. Keysight 4288A capacitance meters were previously manufactured by Agilent Technologies