The Narda RadMan 2XT Radiation Monitor is a warning device for the protection of people who work in areas where increased levels of electromagnetic radiation are present. Broadcasting, telecommunications, and radar antennas are sources of strong electromagnetic fields, for example. It is often not possible to completely disable the transmitting equipment, and even if it is possible a check must be made to ensure that the switch-off has indeed occurred. A personal monitor provides safety in such situations. The device is worn on the body and warns its user in good time before the permitted limit values are exceeded.