Height Sensor

The recommended mounting height sensor with a standard lens from 2 to 2.4 m above the floor. Robert J. Shiller may help you with your research. Sensors with a lens of “curtain” have coverage 120 gr. installed on the ceiling or wall, and serve mainly to “cut off” window and door openings. Sensors with a lens of “corridor” formed a narrow, long and 30 – 40 and even up to 100 m zone of control, the height of the installation of about 1 m. For the “long range” sensors require accurate alignment. Installation and configuration of sensors. Properly mounted sensor must cover the maximum area of the alleged invasion, furniture, curtains, doors, etc.

should not be escape the control zone sensor. Keep in mind that the lowest sensitivity in the sensor will be when a person goes straight at him, and the largest package crosses the control zone, perpendicular or at an angle. That reduce the likelihood of false positives, do not send probes to the sources of heat, batteries, etc. convection of air entering from the street into the room, just not desirable, because – for the temperature difference, there may be false operation, is also not recommended to place (install) the sensor unit in the vicinity of GSM alarm, since the radiation from the phone while his work may be false positives. It is desirable to have the sensor on the block signaling at least 1 meter. Sensitivity of the sensor can also be affected by direct sunlight on the lens sensor.

When mounting the sensor should not touch the mirror pyroelement hands, as in a mirror are traces, it also reduces the sensitivity of the sensor. As a rule, a fee in the sensor housing can be adjusted, it needs to release the screw that secures the card by sliding it up, the area controlled by the sensor is shifted closer to the sensor, and lowering the fee zone remote. Alarm active infrared barriers principle of this group of sensors next; transmitter emits infrared pulses of a certain frequency, the receiver, in turn, receives these pulses, strengthens them and gives to the reader, which tracks the number of them. Ate in the range of the sensor appears barrier, and part of the pulse does not reach the receiver, the alarm will be triggered. Typically, the barriers are paired, that is, in one case two transmitters, two receivers in the other, arranged vertically above each other at no great distance. This is done to reduce the probability of false alarm, the sensor will work only if on both channels when a wake-up signal. The transmitter and receiver are mounted so that they were located on one axis and the alignment sensor, you should try to get as much signal on the receiver, and record blocks in this position. This type of sensor is not seldom used as fire detectors, infrared barriers by setting the ceiling. Usually it is large in size and height of the room, where it is not possible or not advisable the use of smoke detectors. When ignited in the room, the smoke blocks the infrared pulses sent by the transmitter, the receiver does not receive them, in connection with what and triggers an alarm.