Pair of 20m Single Beam Photoelectric Infrared Detectors for Door Security Systems A matched transmitter and receiver pair designed to provide reliable single beam infrared detection at up to 20 meters. Ideal for creating a monitored doorway or short perimeter line in schools, office buildings, hospitals, parking areas, and home yards. Key benefits Reliable perimeter detection: Single beam photoelectric sensing provides clear detection of crossings or intrusions along doors and access points. Long reach: Up to 20 meters detection range lets you cover wider doorways, gates, or short entry corridors with a single sensor pair. Ready to integrate: Designed for use with standard door security systems and alarm control setups to trigger alerts or control access. Practical and space efficient: Supplied as a matched pair for straightforward installation and alignment, minimizing setup time. What it does and how it helps Detects interruption of the infrared beam and sends a signal to your alarm or access control system, helping prevent unauthorized entry and enabling timely response. Supports typical security needs such as entrance monitoring, perimeter control, and access point supervision in public and private facilities. Reduces blind spots at doors and gates when used in pairs or in combination with other sensors. Key attributes Function: Single beam photoelectric infrared detection for intrusion and proximity sensing. Range: Effective detection distance up to 20 meters. Configuration: Supplied as a pair with transmitter and receiver. Compatibility: Intended for integration with door security systems and standard alarm or access control panels. Design: Compact, wall or post mountable form factor suitable for indoor and sheltered outdoor mounting. Typical applications School entrance monitoring: Install at main doors or emergency exits to detect unauthorized crossings during off hours. Office building access control: Use at lobby doors, service entrances, or loading bays to augment card access or alarm systems. Home yard and parking gate protection: Monitor gates or driveway entries to notify occupants or trigger lighting and alarms. Installation and use tips Mount the transmitter and receiver opposite each other with a clear line of sight and minimal obstructions across the intended detection path. Align carefully at commissioning to ensure consistent beam transmission and stable operation. Integrate wiring into the security panel or alarm input designated for external detectors according to your system requirements. A straightforward, reliable solution for door and short perimeter detection where a single beam infrared sensor pair with a 20 meter range is required.