Active optical infrared barriers are high performance detection systems.
Reinforced by 20 years of experience, SORHEA products create an imperceptible, impassable detection zone.

Infrared technology is based on the principle of infrared light invisible to the naked eye.
Beyond visible red light, the spectrum holds near infrared light that is used in active infrared barriers. The cell in a column produces a beam that has a wavelength greater than that of visible light, thereby creating an imperceptible, invisible wall.

Active infrared is generated by a pulsating infrared light source made directional with an angle of about +/- 2° using the lens of the transmitter cell.
The receiver cell located in the transmitter’s cone field senses the infrared pulses and transforms them into an electrical signal.
After analysis by the receiving column, the absence of a signal triggers the alarm.

A transmitter generates a pulsed infrared beam that is sensed by one or more receivers without distinction.
In the event all beams are interrupted, the detection signal triggers an alarm by commutation with an electrical switch.

The infrared barrier is comprised of two columns that can be adjusted in height from 1.10 m to 5 m. The infrared cells that generate the beams are fixed in the interior of the columns. These are activated at a frequency of 1 ms per beam.

A transmission cell is linked only to the corresponding receiver cell.

Therefore, a very rapid sweep and surveillance of the entire height of the column (multiplexed) takes place without the beams interacting among themselves.

The intrusion alarm is activated when 1, 2 or 3 adjacent beams are interrupted (depending on the selected configuration).

Fog is one of the most troublesome factors for infrared. The curve below provides a brief glimpse, for a given product, of the visibility of an infrared beam.
The graph below indicates the maximum range of a MAXIRIS 2000 infrared cell (a type of infrared barrier) with respect to visibility.
When night-time visibility is excellent, the theoretical range reaches 2,550 m.
When visibility is less than 60 m (dense fog), the range is 100 m.

NOTE: In order to ensure constant operation, the installation range must not exceed 100 m in regions where fog can be very dense. This characteristic is common to all infrared barriers regardless of the brande.