Multi Beam Sensor

Multi Beam Sensor

An intelligent sensor, which assures smooth entering or exiting of people, carrier, stroller, etc., from the elevator by restricting the door from closing when it detects any obstacle on the doorway.to ensure their continued performance and safety in elevator systems.

Elevator door sensors are critical safety devices that prevent doors from closing when a person or object is in the doorway. The most commonly used type today is the light curtain sensor.

What is an elevator door sensor?

An elevator door sensor detects obstructions and sends a signal to keep the doors open or reopen them. Modern systems use infrared technology for fast and reliable detection.

Types of elevator door sensors

1. Light Curtain (Most Common)

* Uses multiple infrared beams across the full door height
* Detects even small objects (hands, luggage, children)
* Non-contact and highly reliable

These sensors create a “curtain” of beams—if any beam is broken, the door reopens.

2. Photoelectric (Single Beam Sensor)

* Uses a single infrared beam between transmitter & receiver
* Cheaper but less coverage
* Mostly used in older elevators

3. Mechanical Safety Edge (Old Type)

* Rubber strip on door edge
* Detects obstruction only after contact
* Now largely replaced by light curtains