Latest news for Derwent 
Intruder deterrent system reduces vandalism and cable theft at Network Rail(12/08/2008)
Following a spate of vandalism and cable theft within various parts of Network Rail's infrastructure, TEW Plus Ltd instigated a successful eight week trial of an intruder deterrent system using Derwent' System's new AEGIS White Light LED illuminators. During the day intruders are detected by sensors which trigger a loudspeaker that issues a stern warning to trespassers to leave the site. At night the sensors trigger Derwent's powerful AEGI... [more]
Derwent Launches Intelligent IR Illuminator for CCTV night-time surveillance(09/10/2007)
Derwent has announced the launch of AEGIS, an intelligent IR illuminators for CCTV night-time surveillance. This innovation solves a long standing problem common with all LED based IR illuminators, the degradation of LEDs over time. LED degradation results in poor infrared performance, grainy snowy images and reduced illumination range, in fact, this can be as much as 20% the specified range in as little as six months. To combat this Derwe... [more]
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