Abstract: Home security system installed in an enclosure, window or door and comprising un controlled magnetic field sensor (3) connected to an antenna (4) configured as a single electrode, in such a way that said sensor measures disturbances of the magnetic field around said antenna; and is characterized in that the controlled magnetic field sensor is configured to detect a disturbance in the magnetic field detected by its antenna and establish if there is a presence of a person depending on the power of the disturbance; and send an alert for the presence of a person.

Abstract: The invention relates to an electrostatic field sensor and a security system in interior spaces, which can measure electrostatic fields and the variations thereof along a metal conductor that acts as a detection probe or antenna (1). Said probe is connected to an electronic circuit (2, 3, 4, 31, 32) which is able to decode said changes in the electrostatic field around the conductor, and to detect minuscule variations in the electrostatic field, by means of a processor (7), enabling the clear detection of a human presence in an area surrounding said antenna (1) and the ability to differentiate between a human presence and any other type of animal or object.