What is Occupancy Sensors ?

What is it?

Occupancy sensors are devices that detect and monitor the presence or absence of people in a defined space. They can be used to control lighting, HVAC systems, and other building automation functions based on occupancy patterns.

Why we use it?

We use occupancy sensors to improve energy efficiency, reduce costs, and enhance occupant comfort by automatically adjusting building automation systems based on occupancy patterns.

How it works?

The sensor typically contains a sensing element, such as a passive infrared (PIR) detector or ultrasonic transducer, which detects motion or changes in heat signatures in the space. The device then sends a signal to the building automation system or controller to adjust lighting, HVAC, or other systems based on occupancy status.

Major brands that manufacture it

Some of the major brands that manufacture occupancy sensors include Lutron, Leviton, Honeywell, Johnson Controls, and Siemens.

Types

There are different types of occupancy sensors, including PIR sensors, ultrasonic sensors, and dual-technology models that combine both sensing methods. Some models may also feature additional functions, such as light sensing or wireless connectivity.

How do we select it?

When selecting an occupancy sensor, consider factors such as sensing range, detection angle, sensitivity, response time, power source, and communication protocols. Also, make sure the sensor is compatible with your existing building automation systems and fixtures.

How to install it?

Occupancy sensors should be installed in areas where occupants spend most of their time, such as offices, conference rooms, and hallways. They should be mounted on a wall or ceiling according to the manufacturer's recommendations, and any necessary fittings or adapters should be used to secure the sensor in place.

Wire connections required to receive the signals

The wire connections required to receive the signals from an occupancy sensor may vary depending on the specific device and building automation system. Typically, they will require a power supply connection and a communication signal wire that connects to the building automation system or controller. It's important to refer to the manufacturer's installation instructions for proper wiring connections.