RF safety monitor protects workers from electromagnetic fields

New from Link Microtek is a compact entry-level personal monitor that has been created to give a cost-effective means of alerting telecoms workers to the presence of strong electromagnetic fields. Manufactured by Narda Safety Test Solutions, the RadMan Mobile monitor covers the frequency range 50MHz to 6GHz and provides a shaped frequency response compliant with EMF Directive Action Levels. Despite being a low-cost monitor, the device uses tried-and-tested technology, developed by the company over many years for its successful RadMan range. Capable of measuring both E and H fields simultaneously, the device is particularly suitable for use when carrying out maintenance or repair work in the complex near-field conditions found close to antennas. Warnings are provided by a loud audible alarm, which sounds when the level exceeds 50% of the maximum permissible exposure limit and four LEDs that give an approximate indication of the measured field strength in steps of 12.5%, 25%, 50% and 100% of limit value. The shaped frequency response means that the alarm threshold is always matched over the entire frequency range, so there is no need to adjust it according to the frequency of the field source. As well as providing personal protection when worn on the outside of clothing, the device can be used off the body for monitoring local signal strength, such as locating leaks on waveguide components and coaxial connectors.