The Quiet Trace DFP810 Digital Filter Probe is a cable- and wire-tracing device that blocks interfering noise from common sources including AC power and lighting systems. Its manufacturer, Kurth Electronic, explains that the widely used technique of finding wires using tone-tracing techniques is faster and easier using the DFP810 than other probes, especially near power wiring and fluorescent lighting.
"Digital signal processing makes it possible for the DFP810 non-contact tone receiving probe to sense tracing tones applies to wire and cables," Kurth says, "and distinguish them from the noise represented by the harmonic tones created by 60-Hz power and powered systems."
This demo video shows the DFP810's performance compared to other probe options.