A detection device, comprising: an infrared temperature sensor, configured to provide a temperature signal (S T) associated with an heat emission of at least one individual within a monitored area; an electrostatic-charge-variation sensor, configured to provide a charge-variation signal (S Q) indicative of a variation of electrostatic charge associated with said at least one individual; and a processing unit, coupled to the infrared temperature sensor and to the electrostatic-charge-variation sensor to receive the temperature signal (S T) and the charge-variation signal (S Q) and configured to carry out joint processing of said temperature signal (S T) and charge-variation signal (S Q) in order to detect the presence of said at least one individual within said monitored area, wherein said processing unit is configured to: process a temperature gradient (ΔT) associated with a variation of said temperature signal (S T) with respect to a baseline value in order to detect a first presence indication; process a variation over time of said charge-variation signal (S Q) in order to detect a second presence indication; and generate a presence signal (S P) indicative of the presence of said at least one individual within said monitored area in the case of joint detection of said first and second presence indications in a same time interval; characterized in that said processing unit is configured to enable updating of the baseline value of said temperature signal (S T) for automatically adapting the detection to conditions of ambient temperature of said monitored area, conditionally with respect to the processing of said charge-variation signal (S Q), only in the case where processing of the charge-variation signal (S Q) over time is indicative of the absence of individuals in the monitored area. an infrared temperature sensor, configured to provide a temperature signal (S T) associated with an heat emission of at least one individual within a monitored area; an electrostatic-charge-variation sensor, configured to provide a charge-variation signal (S Q) indicative of a variation of electrostatic charge associated with said at least one individual; and a processing unit, coupled to the infrared temperature sensor and to the electrostatic-charge-variation sensor to receive the temperature signal (S T) and the charge-variation signal (S Q) and configured to carry out joint processing of said temperature signal (S T) and charge-variation signal (S Q) in order to detect the presence of said at least one individual within said monitored area, wherein said processing unit is configured to: process a temperature gradient (ΔT) associated with a variation of said temperature signal (S T) with respect to a baseline value in order to detect a first presence indication; process a variation over time of said charge-variation signal (S Q) in order to detect a second presence indication; and generate a presence signal (S P) indicative of the presence of said at least one individual within said monitored area in the case of joint detection of said first and second presence indications in a same time interval; characterized in that said processing unit is configured to enable updating of the baseline value of said temperature signal (S T) for automatically adapting the detection to conditions of ambient temperature of said monitored area, conditionally with respect to the processing of said charge-variation signal (S Q), only in the case where processing of the charge-variation signal (S Q) over time is indicative of the absence of individuals in the monitored area.