CHAIN REACTION DNA®. a new deterrent to combat home invasion, burglary & doorstep crime!. There are a few thoughts running through a burglars mind when they are committing offences. One of those thoughts is NOT getting caught!. In two thirds of all burglaries committed in the United Kingdom last year access was gained through a door. In response and with the assistance of ERA Security Products StranDNA (UK) Limited has perfected the ultimate, non technical, easy to use, intruder deterrent -- Chain Reaction DNA.. Chain Reaction DNA is a perimeter defense mechanism that will give a burglar more than they bargained for when committing their crimes. We recognised that the certainty of being sprayed with traceable DNA would be seen by today's villains as the ultimate deterrent because when they activate this unique door security device its embedded technology will link them to their crime scenes. How does CHAIN REACTION DNA® work?. • CHAIN REACTION DNA intruder alarm is professionally installed by an industry approved or CRB vetted locksmith unobtrusively to the inside of a door and provides extra resistance to forced entry.. • If the door is forced open, either when locked or ajar on the chain, CHAIN REACTION DNA sounds a high decibel alarm to scare intruders away and to alert neighbours and passers-by.. • CHAIN REACTION DNA simultaneously sprays the intruder's clothes and skin with an invisible UV BASED DNA TRACE forensic marker to which the unique code is registered, through our installation database to a home by you the professional locksmith.. • POLICE can screen criminals through forensic examination, establish the unique DNA CODE found on clothes or skin and then track the criminal back to that home using the StranDNA installations data-base. • CHAIN REACTION DNA gives the POLICE the ability to identify the individual marked as being responsible for the unlawful attempt on that home, contributing valuable forensic evidence which can be used in a court of law..