The HG-10 Professional's Water Leak Detector:The HG-10 combines a patented ground microphone design with a light-weight amplifier
that has selectable filters.
the professional's choice
for finding the smallest leaks in underground water lines.
The patented ground microphone is the most
sensitive, well-engineered leak sensor available. With the six selectable
filters in the HG-10's amplifier, the user can choose the right combination of
low-end filtering and high-end filtering to remove the extraneous noises of
heavy equipment, traffic, wind, etc. that may be present at the job site.
Depress the switch for the 100Hz filter and eliminate all unwanted noise from
100Hz and lower frequencies.
Depress the switch for the 1200Hz filter and
eliminate all unwanted noise from 1200Hz and higher frequencies.
Listen to leaks in PVC pipe in the range of 200 to 600Hz, filtering out all higher and
lower frequencies, and then listen to leaks in cast iron pipe in the range of
400 to 1200Hz, filtering out all higher and lower frequencies again.