Home Services in Baltimore, MD
Home Services • Roofing
6 East Lafayette Avenue,
Baltimore ,
MD
21202
UNITED STATES
Up to the mid 80's water was detected using spot probe sensors. These units would consist of either an etched PCB or two metal electrodes. Sensing for water was done using a DC voltage in one sensor whilst looking for a return signal in the other. Providing no return signal was seen in the return sensor, no water was present.
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