The model 9000 allows you to measure newly installed loops at locations without power or a detector. The tester offers a user-selectable frequency at which Q and L are measured. At power-up, the frequency is pre-set to 50kHz and can be easily changed from 20KHz to 80KHz range using the keypad. Sensitivity settings allow you to use the finder at waist level (high sensitivity) and closer to the ground for greater accuracy (low sensitivity).