Manufactured by Narda Safety Test Solutions, the NIM unit provides a straightforward means of ensuring compliance with the permissible exposure limits laid down in the ICNIRP international standard.
The battery-powered meter features an isotropic, dual-element probe that simultaneously measures electric and magnetic fields, both of which are required for equipment operating below 300 MHz. Users can toggle between E-field and H-field readings at the press of a button, and the instrument features automatic zeroing at power-on and every 15 minutes.
The meter is available in two models: NIM-511 and NIM-513. The NIM-511 has a broad frequency range of 300 kHz to 100 MHz, making it suitable for virtually all equipment operating at ISM (industrial, scientific and medical) frequencies. The NIM-513 operates over the narrower range of 10 to 42 MHz, encompassing the ISM frequencies of 13.56 MHz and 27.12 MHz, which are widely used for semiconductor processing equipment, heat sealers and induction heaters.
With an LED-backlit 1.5-inch LCD display, the meter will operate for about 22 hours on a charge of its NiMH batteries. It is supplied with a hard case, power supply and shoulder strap.