NIDG gives the great possibility of monitoring, detecting and registering the range of events taking place when the Access Control System deployed and equipped with NIDG.

 While a man is passing through the door equipped with NIDG, NIDG provides the information about his "magnetic weight"

While two or more people are passing through the door equipped with NIDG using one access card with preliminary measured "magnetic weight" simultaneously, NIDG fixes the piggybacking event and provides the information about their summary "magnetic weight".



NIDG can be installed in

 1. the doorway without the door, the passage etc.

 2. the doorway with the door.

The door frame dimensions are: 0.8 to 1.0 m width, 2.2 m height.

  NIDG can be hidden from people viewing.

 NIDG operation principle

If a man is in the space filled with quasistationary field produced by field-forming magnetic antenna, NIDG will generate electrical signals depending on man mass and human biological tissue electromagnetic properties on its outputs as a result of interaction between this field and man body.


Electronic block of NIDG (dimensions 120x 70x 30mm)


Passing speed range 0.02...2 m/sec
Magnetic weight measuring error no more than 10%
Operating temperature range +5...+40 0C
Relative air humidity no more than 95% at 20 0C
Supply voltage 12 V
Consumption current no more than 150 mA
Interface RS-485

The electromagnetic field produced by NIDG is nonhazardous for human health.

 spreading NIDG functionalities

NIDG may be designed to operate in more inclement climate conditions (outdoors, rain, snow, etc.).

 The specific NIDG operational frequency can vary in the range of 15% by microswitch. 

 Two NIDGs closely installed can operate without mutual influence if their operational frequencies' difference is about 50%. If two NIDG's operational frequency difference is 10%, they should be installed at the distance not less 2m from each other to work without mutual influence.

 The attempt to stimulate NIDG wrong operating by electromagnetic influence during passing leads to an alarm signal.

 It is possible to design the device for outdoors remote control near the building to get the information about piggybacking events taken place indoors and registered by NIDG.