Perimeter guards are guardrails and security fences as well as safety devices that produce sound waves when a given perimeter is breached

Ultrasonic proximity sensors use reflected or transmitted ultrasonic waves to detect the presence or absence of a target component

Photoelectric sensors use emitters and receivers to detect the presence, absence, or distance of target objects.

Proximity sensors, all types is a general search form for all proximity sensors and presence detection product areas

Intrusion detection systems (IDS) are used to determine whether security has been breached and unauthorized access granted to property, equipment, resources or data

Thermal imagers detect heat patterns in the infrared wavelength (1 micron to 100 micron) spectrum.

Parking control systems and products are used in automobile parking enforcement and management.