Which sensor is used in an elevator door?

Elevators are like magical boxes that transport us up and down in buildings effortlessly. But have you ever wondered how those elevator doors know when to open and close without squishing us? The secret lies in a tiny but powerful device called a sensor. 

In this blog, we’ll take a closer look at the special sensor used in elevator doors and unravel the mystery behind its functioning.

Brief about elevator door sensor 

Door sensors (also known as photoelectric or infrared beam, electric safety door edges, door detector, electric proximity edges, or electric doorman) are elevator devices that detect a passenger or object in the doorway and prevent the doors from closing (typically installed for accessibility). 

If a person or object blocks the doorway and the sensors detect it, the door will reopen and remain open until the person or object leaves the doorway.

If the doors are held open for longer than the specified time, the elevator will enter nudge mode and slowly close the doors with a continuous beep. The door sensors will not work in the fire service mode, so the fireman’s elevator will still require mechanical safety edges when the sensor is not operational.

Some door sensors (such as Memco Panachrome) contain LED illumination lamps that indicate door movement, typically green for door opening and flashing red for door closing. When a person enters and exits an elevator, some door sensors emit a continuous beep and block the doorway (based on sensor system settings).

Door sensors can also detect objects or obstacles that are blocking the doorway.

Understanding the Elevator Door Sensor Price becomes essential in making informed decisions that balance cost-effectiveness with the need for reliable and advanced sensor systems.

What are the Types of elevator door sensors?

All elevators equipped with door sensors may require an independent power supply to function properly. Door sensors usually work in pairs, with the transmitter unit (or TX unit) presenting the infrared beams to the receiver unit (or RX unit), which receives the infrared beams and activates the sensors.

• Normal door sensors

This type is simply a standard door sensor installed inside the car doors, not on the inside of the outer landing doors.

• Mixed door bumpers and sensors

These are mechanical door bumpers with integrated door sensors. Some elevator manufacturers use this type of door sensor.

• Electric eyes

This type of elevator sensor, also known as photo eyes, consists of two small infrared sensors or light bulbs (in older elevators) mounted on the knee level of the car door jambs. They can also be found on hall door jambs, but they are extremely rare.

• Safety ray

Safety rays are one or two infrared light beams that cover the entire width of the doors.

• Multi-beam door sensors

These are multiple infrared light beams that cover about 1800mm of the height of the doors.

• 3D Multi-Beam Door Sensors

These door sensors are similar to the multi-beam type described above, but they use 3D sensors to monitor the hall by expanding multiple infrared-light beams.

• Ultrasonic Door Sensors

These are door sensors that use sound waves to scan a 3D area around open doors. This type is extremely rare in most modern elevators.

• WECO DOOR SENSOR

94 or 174 crossed beams

Detecting range 4000mm

Auto standby

Low power consumption

Sunlight protection

When evaluating Elevator Door Sensor Prices, it’s important to take into account the overall value and performance offered by the sensors.

Which sensor is used in the elevator door?

Elevator doors typically use various sensors to ensure safe and efficient operation. The specific sensor used may vary depending on the elevator model and manufacturer, but some common types of sensors include:

1. Infrared Sensors: These sensors use infrared beams to detect objects or obstructions in the doorway. If an object or person is detected, it signals the doors to remain open or reopen.
2. Ultrasonic Sensors: Ultrasonic sensors emit sound waves and measure the time it takes for the waves to bounce back. They can be used to detect obstacles in the path of the elevator doors.
3. Photoelectric Sensors: These sensors use a beam of light and a receiver to detect the presence of objects. If the beam is interrupted by an object, the sensor triggers the doors to open or prevents them from closing.
4. Pressure Sensors: Pressure-sensitive edges or mats can be placed along the door frame to detect pressure exerted when an object or person is in the doorway. This prompts the doors to stop or reopen.
5. Hall Effect Sensors: These sensors can detect the presence of metallic objects, such as the metal edges of the elevator doors. They are often used as a safety feature to prevent doors from closing on an obstruction.

The combination of these sensors ensures that elevator doors operate safely and prevent accidents or injuries by detecting obstacles and responding accordingly. Keep in mind that the specific sensors used may vary among different elevator systems and manufacturers.

The usage of reliable Elevator Door Sensors not only enhances safety but also reduces the risk of malfunctions, thus showcasing their significance in modern elevator systems.Contact MAS Industries for the best elevator sensors.