Which type of sensor detects only foot traffic?

Which type of sensor detects only foot traffic?

• A. Seismic Point Sensors (SPS)
• B. Magnetic Vehicle Detection Sensors (MVDS)
• C. Infra-Red Devices (IRD)
• D. Pressure Pads

Answer: (C)

The type of sensor designed to detect only foot traffic is the Infra-Red Device (IRD). These sensors work by using infrared light to sense the presence of objects, specifically distinguishing pedestrians through their heat signatures or movement. This capability makes IRDs ideal for monitoring areas where only foot traffic is expected, such as pedestrian walkways or entrances. Other options present sensors that have different purposes. Seismic Point Sensors (SPS) are typically used to detect vibrations, often from vehicles or larger movements, which would not effectively focus solely on foot traffic. Magnetic Vehicle Detection Sensors (MVDS) are specifically designed to detect metal objects, primarily vehicles, and do not register foot traffic. Pressure pads, while they can detect the weight of a person when they step on them, can also register the weight of other objects, making them less precise for exclusively tracking foot traffic compared to the infrared technology which relies on thermal detection specific to humans.

The type of sensor designed to detect only foot traffic is the Infra-Red Device (IRD). These sensors work by using infrared light to sense the presence of objects, specifically distinguishing pedestrians through their heat signatures or movement. This capability makes IRDs ideal for monitoring areas where only foot traffic is expected, such as pedestrian walkways or entrances.

Other options present sensors that have different purposes. Seismic Point Sensors (SPS) are typically used to detect vibrations, often from vehicles or larger movements, which would not effectively focus solely on foot traffic. Magnetic Vehicle Detection Sensors (MVDS) are specifically designed to detect metal objects, primarily vehicles, and do not register foot traffic. Pressure pads, while they can detect the weight of a person when they step on them, can also register the weight of other objects, making them less precise for exclusively tracking foot traffic compared to the infrared technology which relies on thermal detection specific to humans.