FNIRSI ERD-10 4-in-1 electromagnetic radiation detector EMF ERD-10

The FNIRSI ERD-10 is a portable 4-in-1 electromagnetic radiation detector that measures electric fields (EF), magnetic fields (MF), radio frequency (RF) radiation and ambient temperature in one compact device. Readings appear on a 2.4-inch TFT colour display with light and dark modes, backlighting and large digits, so values remain easy to read in dim rooms or bright light. Measurement ranges extend up to 1999 V/m for electric fields and 99.99 µT for magnetic fields.

A curve mode shows how intensity changes over time, which helps you locate a source and check how strong it is at a given moment. Audible, vibration, light and on-screen alarms can be set to your own thresholds, by default above 40 V/m for EF and 0.4 µT for MF. The HOLD function freezes the current reading for easier comparison.

An integrated 1000 mAh battery is charged via USB-C, and the device switches off automatically when not in use. Weighing about 143 g, it is easy to carry around the home or office to check appliances such as routers, microwave ovens, refrigerators and laptops.