| 摘要 |
A device for non-contact measurement of current flowing in a wire, cable, or conductor (100) includes a small coil (102) having multiple turns and no ferromagnetic core. The coil (102) is secured to a wand or housing for placing the coil (102) in close proximity to the wire, cable, or conductor (100), whereby a voltage is induced in the coil (102). A readout (105) indicative of the magnitude of the induced voltage comprises a digital display, a series of light emitting device, or a flashing light emitting device having a flash rate proportional to the magnitude of the voltage. A scaling device (103) renders the readout display indicative of the current flow in the wire, cable or conductor (100). The device constructs in a wand or pen-like fashion, with the coil incorporated into the wand. The device may be combined with a voltage sensor to read out relative voltages.
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