It emits a sonic pulse, and when a knife or gun is present, the pulse is reflected back, triggering an alarm and a light.
"In some cases, there is actually going to be a period of time when those tires are going to be driven, underinflated, while not triggering an alarm," said Ann Wilson, senior vice president of the association.
When the mice sniff traces of any of eight key explosives in the air, they are conditioned to avoid the scent and flee to a side chamber, triggering an alarm.
The system is meant to prevent collisions by triggering an alarm if two trains are on the same stretch of track, and was introduced across the German rail network after two trains crashed in Saxony Anhalt in January 2011, killing 10. "It should automatically prevent train collisions by forcing the trains to brake," Dobrindt said.
The driver cruised through an E-ZPass toll lane at 5 56 a.m., then nicked a 12-foot-high warning bar, triggering an alarm and a stop light just outside the tunnel in Jersey City, said Steve Coleman, a Port Authority of New York and New Jersey spokesman.
The owner in the easy case is tracked continuously until leaving the scene without his luggage, triggering an alarm event.
This mechanism uses an alarming system to trigger an alarm and report if any entries in the filter exceed the threshold value.
The smoke machine triggered an alarm and the fire brigade arrived after receiving an automatic callout.
After the BZ took effect, they triggered an alarm indicating a chemical attack.
Although the bags were equipped with acoustomagnetic sensors, designed to trigger an alarm, that did not serve as a deterrent.
The system can also be set up to trigger an alarm on an electronic map screen if a vehicle goes somewhere unauthorized.
