The Extech TG20 is a wire tracer kit that can easily trace wires from source to termination. The device is capable of identifying wire pairs, continuity checking, and testing of telephone line ...
In the mid-1970s, HP developed a set of three handheld probes; a logic probe (HP 545A), a current pulser (HP 546A), and a current tracer (HP 547A). These were replaced later with the updated HP10525T ...
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