Occupancy Sensor vs Motion Sensor

Occupancy Sensor Vs Motion Sensor

With the advancement in technology, the lives of people have eased out. Smart homes have become the new normal. You walk in, and the lights automatically switch on. You walk out, and the A.C. switches itself off. A major chunk of the credit behind this facility goes to sensors. Sensors facilitate the detection of human presence. The job of sensors is to determine a person’s presence in a certain environment. This mechanism is utilized in various types of applications, ranging from security purposes to enabling smart homes. Sensors may be of many types, occupancy sensor and motion sensor being its two broad categories. This article will help you develop a perspective on these two censors, help you compare and contrast them, understand their functionality, and which one suits what purpose the best!

What is an Occupancy Sensor?

Occupancy sensors are installed indoors to identify an individual’s presence to automatically control things such as the ventilation framework, temperature levels, lights, etc. The sensors make use of microwave, infrared, ultrasonic or some other form of innovation. Gadgets such as smart meters, lodging key-card bolts, and PIR sensors employ this technology. An occupancy sensor is normally used to save energy, give programmed control, and comply with building rules and regulations. 

The pros and cons of Occupancy Sensor


· Energy-saving: By making use of an occupancy sensor, you can save energy. They automatically turn off the lights when there is nobody in the room, which means that you will save energy and prevent light pollution. 

· Cost-effective: Energy saving also results in the deterioration of your electricity bills. The lower the consumption of electricity, the lesser the bill. This means that using technology that employs occupancy sensors is a one-time investment because, in the long run, it is a very cost-effective solution. 

· Ensures safety: Since occupancy sensors automatically turn the light on, it serves as a warning to the authorities that someone has trespassed if someone manages to get into the premises. Thus, occupancy sensors can serve many purposes. 


· Lack of precision: When compared to motion sensors, occupancy sensors offer less precision. They cannot trace movement as well as the motion sensors. However, they are inexpensive compared to motion sensors and better at the precision game than the rest of the sensors. 

What is a Motion Sensor?

An electronic gadget intended to identify and gauge movement, the motion sensor is utilized in business and house security frameworks. However, using a motion sensor is not just restricted to the security framework; it can also be used in telephones, gaming consoles, paper towel containers, and even in VR systems. What sets a motion sensor apart from the other handheld sensors and can be disconnected is that a motion sensor is an implanted thing. A mechanical component, sensor unit and a fixed computer are its three significant parts. These three components differ in design and sign as a motion sensor can be altered for performing exceptionally particular functions. For instance, motion detectors can be utilized to actuate floodlights, trigger discernible alarms, turn on/off switches, and something as important as alerting the police.

The Pros and Cons of Motion Sensor


· Convenient: One of the best things about gadgets that employ motion sensing is that they are easy to install. They require one-time installation, and not much maintenance is needed after that. Hence, motion sensors offer a lot of conveniences.

· Long lifespan: You do not have to waste time, energy and money on getting your motion sensors repaired or replaced as motion sensors offer longevity. Their long life span makes them an economical and hassle-free option to consider. 

· The security factor: Motion-sensing lights can also be used as a security mechanism. Not only will they alert you if someone is standing at your porch, but they can also shoo away the predatory animals from there. As soon as the lights sense commotion, they put the spotlight on the entity. Hence, scaring away the wild animals. 


· Expensive: Since the motion sensors are very pricey in measuring the movement of a person, they are more expensive compared to occupancy and other types of sensor. The brighter side to this, though, is that they are long-lasting, which means that all the expenditure must be incurred just once. 

Comparing and Contrasting Occupancy Sensor with Motion Sensor

The main difference between an occupancy sensor and a motion sensor is the level of sensitivity. While the limitation of the occupancy sensor lies in the fact that it is just meant for a certain targeted area, the motion sensor’s weakness is its inability to detect stationary objects. Thus, while both serve as sources of saving energy and money, occupancy sensors are cheaper than motion sensors. However, when it comes to using them for security purposes, then motion sensor is a better option because it is more particular in its tracing and tracking of movement.   

The Final Verdict

Both occupancy sensor and motion sensor have their pros and cons. Which sensor you should choose completely depends upon your primary usage. 

If you want sensors for granular access control, you must go for occupancy sensors. Occupancy sensors are the best suited for places that typically remain unoccupied for two-plus hours, and the lights tend to remain on even during the intermittent period. Such places include filling areas, corridors, classrooms, restrooms, warehouses, conference rooms, storage areas, break rooms, etc. On the other hand, motion sensors are more suitable for home or hotel use. Since they can be used to notify, you can use them to alert you regarding your pets or with context to trespassing and security breaches. You can also employ them to alarm you if you have a small kid to take care of.

Thus, both the sensors are important in their unique ways. However, while motion sensors are a better option for personalized use, occupancy sensors are better for general use.