Greenlee Filter Probe Inductive Amplifier 200FP With Noise Filter VG Condition. Condition is Used. I have a good condition Greenlee Filter Probe Inductive Amplifier 200FP With Noise Filter for sale. This unit has been cleaned, sanitized and tested to be working The probe has some signs of wear including scratches and markings, please see pictures for condition details. This listing is for the probe and carrying scrap only (as pictured). It does not come with batteries. Please feel free to contact me with any questions or concerns. Thanks