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Extech EMF450 Multi-Field EMF Meter

Measures Magnetic Field, Electric Field and Radio Frequency Strength

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Extech EMF450 Multi-Field EMF Meter
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  • Extech EMF450 Multi-Field EMF Meter

The EMF450 is a convenient 3-in-1 EMF meter which simultaneously measures and displays Magnetic Field, Electric Field and Radio Frequency Strength. Ergonomic pocket-sized design with an easy-to-navigate menu.


  • Multi-Field measurements: Magnetic Field, Electric Field, and Radio Frequency (RF) Strength
  • Magnetic Field Triple Axis Sensor (X, Y, Z)
  • Audible alarm
  • 2.4" (240 x 320 pixels) color TFT display
  • Adjustable screen brightness (low, medium, high)
  • Store up to 20 RF historical records
  • Data Hold and Auto Power Off with disable feature
  • Five languages: English, Traditional/Simplified Chinese, Japanese, Spanish
  • Complete with 3 AAA batteries and USB power supply cable
Specifications Range Max Resolution Basic Accuracy
Magnetic Fields (50/60Hz) 20/200/2000mG 0.02/0.1/1mG ±(15%+100 digit)
2/20/200μT 0.02/0.1/1μT
Electric Fields (50/60Hz) 50V/m to 2000V/m ±(7% + 50dgt)
RF Strength (50MHz to 3.5GHz) 0.02uW/m² to 554.6mW/m² 0.02μW/m²
0.02uW/cm² to 55.4uW/cm² 0.002μW/cm²
36.1mV/m to14.46V/m 0.2mV/m
0.02mA/m to 38.35mA/m 0.2μA/m
-51dB to 16dBm 2dB ±2dB at 2.45GHz
Dimensions/ Weight 4.5 x 2.4 x 0.8" (115 x 60 x 21mm)/ 4.2oz (120g)
Bargraph Magnetic Fields RF Strength Electric Field
Green 0 to 10.00mG 0 to 0.99mW/m² 0 to 500V/m
0 to 0.59V/m
Yellow 10.01 to 100mG 1 to 9.99mW/m² 501 to 1000V/m
0.6 to 1.9V/m
Red 101 to 2000mG >10mW/m² >1001V/m