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Applications & Solutions : What’s the Difference Between PIR and Dual Technology Occupancy Sensors?


What’s the Difference Between PIR and Dual Technology Occupancy Sensors?

Different applications call for different types of occupancy sensors - make the right call. 

Library sensors 


Perhaps youve noticed it when entering a meeting room or putting supplies away in the office closet. You cross the threshold and, in an instant, the space illuminates like magic. 


This unseen phenomenon is likely the work of tried and trusted occupancy sensors. The easy-to-install controls are a straightforward way to increase efficiency in your home, office or municipal building while giving occupants one less thing to worry about - turning on the lights.  


Still, once youve decided to make the switch to occupant sensors, you may be questioning which type of sensor is the best fit for your space. To help you make the right call, heres a quick overview of two of the most common occupancy and vacancy sensor types: Passive Infrared and Dual Technology. 



Passive Infrared Technology Sensors 

Passive Infrared (PIR) sensors work by detecting the presence of heat energy in confined spaces. Though used in a slightly different way for lighting applications, its the same core technology found in thermal imaging devices, advanced telescopes, night vision equipment and a host of other innovative tools.  


Affordable and simple to install, PIR sensors are a versatile control type that can work in a wide variety of everyday settings, including single-use bathrooms, meeting rooms and storage areas. However, one drawback is that PIR sensors require a direct line of sight between the sensor and any motion in order to function properlyBecause of this, its best to use them sparingly in open spaces, as well as areas that are restricted by barriers, walls or other large objects.  


Dual Technology Sensors 

Similarly, Dual Technology sensors are smart solution that can help reduce energy waste and provide an additional level of convenience for occupants. They work using a combination of PIR and Ultrasonic technology. As individuals move throughout a given space, Ultrasonic wave analysis and the Doppler effect help detect indirect motion while passive infrared sensors monitor presence directly.  


This hybrid approach makes them extremely responsive and highly reliable, even in large areas with obstructions or dividing walls. Theyre the perfect solution for managing lights in an open office space, library, commercial manufacturing facility or large common area.


PIR v Dual Technology Sensors


Benefits of Upgrading Occupancy Sensors 

Beyond the added convenience, integrating PIR or Dual Technology occupancy sensors in your home or office is a surefire way to extend the life of lamps and lower monthly energy costs. Youll never have to worry about whether or not you remembered to shut off the lights again - its automatic.  


Whats more, both types of cost-effective sensors are a snap to install for both retrofit projects and new construction. Whether youre just breaking ground or renovating an existing space, theres no better time to upgrade your room-specific lighting controls than now.  


Check out the video below to learn even more about PIR and Dual Technology sensors!


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