So simple to use, ESI 21 easily measures radiofrequency radiation from wireless technologies such as WiFi, DECT phone, alarm, mobile phone, GSM, smart meters and even a microwave oven. Indicates field strength with a series of 10 LEDs and sound. Two ranges: normal sensitivity and high sensitivity. LEDs change from green to yellow to red. Use it to find hidden sources of RF or to test shielding performance. No external antenna or knobs to break off. Fits easily in a pocket or purse. Its German-made quality and attractive price makes it one of the best economy RF detectors on the market. Covers 50 MHz to 8 GHz. Uses one 9V battery, and has a 1 year warranty.
Completely Portable Need something smaller? This mini version weighs only 0.7 ounces and is about the size of a pack of gum. Easy to keep...View full product details
Professional Quality and Versatility This meters meets all TCO requirements for AC Electric and Magnetic Field measurements. Tremendous sensitivity and highly linear over 4 selectable...View full product details
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