HBPIR SENSORS- FAST RETURN ON INVESTMENT

HBPIR SENSORS- FAST RETURN ON INVESTMENT


Today, warehouse area managers are looking for any way to reduce costs. Energy is a significant expense in most operations and inefficient lighting systems are the main causer. Estimates vary on how much energy is consumed by lighting, but in certain applications they can be 70% or more. It is easy to see that changes here can yield significant results to overall operational costs.
There are two ways to reach cost savings:  upgrade your luminaires and install lighting controls. Fluorescent High Bay and Low Bay luminaires - now the mainstay of industrial, warehouse and sport hall lighting due to their obvious energy savings - are rapidly replacing existing metal halide and high pressure sodium luminaires.

However, many people overlook the fact that an additional savings of 50-75% can be realized when HBPIR (high bay) occupancy sensors are also incorporated into the lighting system. This layered approach of efficient lighting and occupancy based controls significantly reduces energy and maintenance costs.

Why Use Occupancy Sensors?

Applications like warehouses, distribution centers, production facilities and other industrial spaces with occupancy less than 50% and with high ceilings (5-12 meters) are ideal candidates for sensors. High bay lights use main part of energy and often shine when the space is empty or unused. What is more, the majority of the facilities does not have the ability to control their lighting, so these fixtures continue to stay ON and waste energy as well as money, even when the space is unoccupied. Occupancy sensors save energy and money by delivering light only where you need it, when you need it.

 

 


Consider a large warehouse with many long rows of racks/shelves loaded with goods. A “pick order” is issued, the picker identifies the aisle and drives a forklift truck into the space to pick the appropriate order. If no HBPIR sensors are in use, the entire area is illuminated before and after the picker enters the space – even if there is no one else in that area. This wastes energy and leads to higher costs. Now, with HBPIR sensors, the sensors will see the movement of the approaching forklift and turn on the lights only where the movement or occupancy is detected– significantly reducing energy consumption and costs. Sensors coverage patterns are wide enough to identify movement and turn on the lights well before the forklift enters the space. Moreover, with the programmable timer the lights will again be turned off after a set period of inactivity – usually 10 – 15 minutes.
This is just one example of how occupancy sensors can cut costs and reduce energy consumption.

How Do Sensors Work? Sensor Switch Passive Infrared Technology

HBPIR (High bay) sensors use a Passive Infrared (PIR) element detector located behind a multi-segmented Fresnel lens. Each lens segment generates a pair of collector beams. As infrared heat, given off by the human body, moves in and out of the beams, the detector "sees" this and triggers the occupancy mode. The lens creates a continuous array of beams that provide even coverage over a space so that occupants are detected anywhere within the coverage pattern.

DEFINITIONS:
• Passive Infrared (PIR):  A line of sight beam that reacts to heated motion across a field of view.  It is a type of sensor technology, where no energy is emitted from the sensor.
• Microwave (MW):  It is a type of sensor technology, which sends out microwave pulses (active) and measures the reflection off a moving object. Similar to a police radar gun.

PASSIVE INFRARED

(PIR)

MICROWAVE

(MW)

 


Which Coverage Pattern Best Suits Your Application?

One of the key components of a HBPIR sensor is the lens that determines the coverage pattern for the particular sensor. In high bay applications, the most common types of coverage patterns are 360 degree and aisle coverage patterns.

 

FIELD OF VIEW

 

 


Images above illustrate the coverage pattern for HBPIR occupancy sensor. This device looks down from either the high bay fixture or the junction box that it is mounted on, and covers an area extending out from the point directly below the mounting position. The size of this area depends on the mounting height.

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