The pocket detector for a starter kit, usually sold for the price of a takeaway dinner. One button switches between electric field in volts per metre and magnetic field readings, an LCD shows the value with a hold function, and a threshold alarm beeps once the field crosses the set level. It fits a shirt pocket, runs on a small battery and weighs almost nothing, which matters on a five hour walkabout.
Expect indication rather than measurement. Accuracy is nothing to build a report on, the sensor reads one axis, and readings drift if the unit is waved about. As a cheap second or third meter it earns its keep: several investigators can each carry one, and losing one in a field is not a tragedy. Anyone planning to publish findings should treat it as a scout and confirm with something calibrated.
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