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Find magnetic field measuring equipment, such as EMF meters, at Grainger to help diagnose problems with electrical wiring and appliances. A microwave leakage detector can help monitor wave leakage and test microwave oven power. Use a triple axis electromagnetic field (EMF) tester to help monitor EMF radiation levels around power lines and industrial devices. A ballast checker can help determine lighting ballast types. Get high-quality EMF meters from Grainger to help provide accurate electromagnetic field readings.