Which of the following is NOT a type of intrusion detection system sensor?

Time-auxiliary is not a recognized classification of IDS sensor in electronic security systems. It is a nonsensical term that does not correspond to any physical detection principle used in intrusion detection technology.

Capacitance sensors are real IDS sensors that detect changes in an electric field caused by an intruder approaching or touching a protected object or area.

Vibration sensors are a legitimate IDS sensor type that detect mechanical disturbances or impacts transmitted through walls, floors, or safes.

Electromechanical sensors are a foundational IDS sensor type that use switches and contacts to detect the opening of doors, windows, or other physical barriers.

Thermal sensors, including passive infrared (PIR) detectors, are a standard IDS sensor type that detect heat signatures emitted by intruders moving through a protected space.