Hotron & Optex Safety Sensors

Active Infrared Sensors

Active infrared sensors are widely used in automatic door systems to provide reliable pedestrian safety and object detection. They work by transmitting infrared light and continuously measuring the reflected signal. When a person or object enters the detection zone, the change in reflected light is detected, causing the sensor to activate its relay. Depending on the application, this can trigger an automatic door to open or prevent it from closing, ensuring safe and reliable operation.

Radar (Microwave) Sensors

Radar sensors, also known as microwave sensors, use Doppler radar technology to detect approaching movement. The sensor continuously emits microwaves across the detection area and monitors the returning signal. When movement is detected, the change in frequency activates the relay, allowing the automatic door to open quickly and efficiently. Microwave door sensors are ideal for busy commercial entrances, providing reliable motion detection while minimising false activations.

Door Learn Technology

Door Learn Technology is an intelligent automatic door safety system designed to enhance pedestrian protection. Working alongside active infrared sensors and microwave detectors, it automatically learns the door’s movement and precisely defines the safety zones around it. This enables detection areas to be focused both in front of and inside automatic sliding doors, helping to reduce nuisance activations while maximising user safety and compliance with automatic door safety standards.

Whether you’re specifying automatic door activation sensors, safety sensors, or combined microwave and infrared detection systems, these technologies provide reliable performance for commercial, healthcare, retail, educational, and public sector automatic door installations.