Passive infrared (PIR) sensors measure infrared light that radiates within its point of view. It identifies human presence and motion, allowing property or homeowners to know if someone has been in the premises. Many monitored home security system devices use this electronic sensor to detect burglars and intruders. It’s small and uses minimal power, making it cost-effective and highly reliable for safety and protection.
How Does It Work?
Anything with a temperature of above absolute zero emits heat energy in the form of radiation. It’s invisible to the naked eye, but radiates through infrared wavelengths. Only devices like PIR motion sensors can detect these. Automatic lighting systems, security cameras, and burglar alarms are among the technologies that use this function.
In addition, PIR sensors also use light to detect the presence of people within particular premises. It works by registering light levels between the point source and the sensor. It can reach up to six meters, depending on the device’s features. When someone goes inside the area and blocks the point light source, the sensors automatically send a signal to the control box immediately.
Does It Provide Accurate Readings?
PIR sensors have two halves. This means it won’t detect radiation itself, but rather, the change in the environment. For instance, within the sensor’s range, there are already objects that emit radiation. For these to work properly, it needs to detect a change other than the existing objects in its range. This way, the PIR sensors can produce a more accurate reading, which will activate the technologies you use at home. A good monitored alarm system will never signal false alarms, so make sure to buy from a reliable supplier.
When hiring security system companies, make sure that their equipment packages include passive infrared (PRI) sensors and other advanced features. This way, your family, property, and belongings are safe and secure from break-ins or theft 24/7.