Abstract: A sensing device comprising an electromagnetic sensor having a surface with a plurality of different electromagnetic radiation interception areas arranged one above the other, one or more controllable flaps adapted to cover one or more of the different electromagnetic radiation interception areas preventing the electromagnetic sensor from intercepting electromagnetic radiation on the covered electromagnetic radiation interception areas, at least one control mechanism adapted to maneuver the controllable flaps so as to change the covered electromagnetic radiation interception areas and a plurality of lenses located in front of the electromagnetic sensor, each having a different focal length. One of the lenses has a certain focal length and focuses electromagnetic radiation to at least one of the different electromagnetic radiation interception areas, and another of the lenses has a different focal length and focuses electromagnetic radiation to another electromagnetic radiation interception area.

Abstract: A sensing device, comprising: a first sensor, directed vertically down in relation to an identified orientation of the sensing device; at least one second sensor, directed diagonally forward in relation to the identified orientation; at least one hardware processor, electrically connected to the first sensor and the second sensor adapted to: receive at least one first signal from the first sensor or the second sensor indicating a person's presence in a monitored premises; and until receiving at least one second signal from the first sensor or the second sensor indicating an absence of the person from the monitored premises: during a predetermined delay time after receiving the first signal, determine whether one or more expected signals are received from the first sensor or the second sensor; and determine an alarm system operation to be taken subject to the one or more expected signals not being received, according to the determination.

Abstract: A sensing device, comprising: a first sensor, directed vertically down in relation to an identified orientation of the sensing device; at least one second sensor, directed diagonally forward in relation to the identified orientation; at least one hardware processor, electrically connected to the first sensor and the second sensor adapted to: receive at least one first signal from the first sensor or the second sensor indicating a person's presence in a monitored premises; and until receiving at least one second signal from the first sensor or the second sensor indicating an absence of the person from the monitored premises: during a predetermined delay time after receiving the first signal, determine whether one or more expected signals are received from the first sensor or the second sensor; and determine an alarm system operation to be taken subject to the one or more expected signals not being received, according to the determination.

Abstract: A sensing device comprising an electromagnetic sensor having a surface with a plurality of different electromagnetic radiation interception areas arranged one above the other, one or more controllable flaps adapted to cover one or more of the different electromagnetic radiation interception areas preventing the electromagnetic sensor from intercepting electromagnetic radiation on the covered electromagnetic radiation interception areas, at least one control mechanism adapted to maneuver the controllable flaps so as to change the covered electromagnetic radiation interception areas and a plurality of lenses located in front of the electromagnetic sensor, each having a different focal length. One of the lenses has a certain focal length and focuses electromagnetic radiation to at least one of the different electromagnetic radiation interception areas, and another of the lenses has a different focal length and focuses electromagnetic radiation to another electromagnetic radiation interception area.