Differences Between IR Sensors & RF Sensors

Hello Guys,

Infrared (IR) sensors and radio-frequency (RF) sensors both contribute to keeping our homes smart, but their methods and effects vary considerably. IF sensors detect infrared light and transform it into an electric current subsequently detected by a voltage or amperage detector. RF sensors operate on electromagnetic waves propagated by antennas. Motion detectors often use an IR sensor that triggers an outside light, while wireless mice often use RF sensors.

IR Advantages
Although infrared light comprises just a tiny sliver of the electromagnetic spectrum, it works extremely effectively for controlling home electronics remotely. When you change channels on your television with your remote control, for example, your television's IR sensor receives the message encoded in an infrared light signal emitted from the remote and performs the task. IR also offers the advantages of low energy requirements and the fact that it gives off no radiation rays.

RF sensors build on IR technology
The downside of IR sensors lies in the fact that they don't pass through opaque or solid obstacles. Thus, if you want your remote control to work on your television set, for example, you must point it directly at the television. But by using a radio-frequency sensor, you can overcome those physical restraints. For RF sensors to work, they can be anywhere on the interior or exterior of a house. They simply beam a signal anywhere and then translate it to an IR signal. The RF signals go to a hub, or tower, which then translates them into IR sensors.

Working Together for Smart Homes
To achieve a "smart home," implement both IR and RF sensors. Using both types of sensors allows you to avoid a great deal of unnecessary wiring, saving labor and material costs. Combining the two will serve you well in a home that has multiple rooms and multiple receiving devices such as televisions and speakers. Outside the home, IR sensors can also sense temperatures, flames and human beings. RF sensors can detect vehicle identification at toll roads, as well as breaking glass and even fluid flow levels.

Thanks and Regards
Steven Brooks