Fisher Sondes are small transmitters used to trace the path of
non-metallic pipes and locate blockage in a line. Sondes are
inserted into a pipe or duct by means of a push rod and the location
found by means of a receiver. We offers 4 sondes for use with your
line locator at the frequencies listed below.
82.175 kHz (use with TW 8800)
8.275 kHz (use with
81.92 kHz (use with TW-6)