Gretsch-Unitas: approach area monitor. Requiring nothing more than the supply of voltage, the approach area monitor can be installed above any door.

Its sensors monitor an individually determinable area in front of a door. Visual and acoustical alarms clearly signal the approach of a person.

Thus, any attempts to misuse a door are hindered from the start and not only as the door is opened as it is the case with Escape Door Security Systems according to EltVTR.

The installation of the approach area monitor does not require any constructional changes on the door.

Escape routes are not affected in any way. Retrofitting the monitoring system is especially profitable on fire doors.

Expert knowledge to start up the monitor is not needed.