The system, called Child Rescue Alert, sends information to the media immediately after a child who is believed to be at risk goes missing.
TV and Radio stations in the area can then be interrupted with news flashes carrying a hotline number. A protocol with local broadcast journalists on the implementation of the scheme is now in place.
The force is piloting the scheme following the success of a project used in the US called America's Missing Broadcast Emergency Response (Amber).
Chief superintendent Jeremy Paine, who led the Sarah Payne murder hunt, has been leading the force's lobbying efforts for an introduction of the alert system across the UK.