We want to know when someone is present. We want to automatically light the way in the dark or open a door for convenience. We may want to turn on video surveillance. We want to know if an intruder has violated secure space and has triggered an alarm. We may want to detain the intruder in the space just invaded.
What is a sensor and how does a motion sensor provide this automated surveillance security to detect the presence of a body and to trigger a programmed response? What kind of security system surveillance sensor is the best? There is a choice between active sensors – ultrasonic, microwave, or tomographic – or passive systems or PIR that use infrared detector sensors.
Simple and reliable, passive infrared sensors are the top choice among all competing space and motion detector technologies. And because the PIR has become so popular, Dexter Research Center supports OEMs to make the technology as reliable as possible.
At the core of our Thermacon product is the world’s leading passive infrared detector sensor: the thermopile, manufactured right here at our U.S. headquarters. Our infrared detector components are rugged. That’s why they were chosen for many space shuttle flights, why they will soon go to the Moon, and why they are the sensing backbone of U.S. military combat ground vehicles and aircraft.
Our detectors can be precisely targeted to as little as a tenth of one degree Celsius. They help to prevent false alarms in systems for in-home security, workplace security, and request-to-exit applications.
Dexter’s PIR based Thermacon products can be deployed to detect the presence of natural body heat. Because they are passive motion detectors, they emit no signals to help an intruder identify their placement for evading or neutralizing them. They detect reliably reliable, and they are far more durable and energy-efficient green than competing detector technologies.
Objects above absolute zero and all living creatures emit energy in the form of infrared radiation. Electronic devices designed for such a purpose can detect this infrared radiation, which is otherwise invisible to the human eye. These devices are call “passive” because PIR
devices do not generate or radiate any energy for detection purposes. They work entirely by detecting the energy given off by other objects and require no external power source to function as detectors.
Dexter’s PIR Thermacon PIRs detect changes in temperature at their targeted focal point. When a human friend or intruder, or an object, enters the zone being observed, a Dexter Thermacon PIR detects a change from room temperature to body or object temperature. This triggers the detection. Objects that have the same temperature as the monitored room will not do this.
This motion sensor technology may be deployed to detect a homeowner, office or plant worker, customer, or intruder. When a human enters the field of view of the PIR motion detector, a change of energy occurs from room temperature to the human’s temperature. This results in the generation of a detection signal. If the system is armed, depending on the system’s assigned tasks, a light will come on, a door will open or close, a door will lock or unlock, video turns on, or an alarm will result.
In addition to sensing motion, Dexter’s world-renowned passive infrared detectors are excellent for monitoring temperature, fire, gas, a loss of heating or cooling, or temperature differentials between sensitive interacting media.
One or more of these additional detecting capabilities can be packaged with a motion sensor. Again, because of their simplicity and reliability for performing these additional monitoring duties, Dexter’s Thermacon cores are an excellent choice for any multi-sensing unit.
With over four decades of successful collaborations on commercial and military design applications, Dexter is currently seeking manufacturing and distribution relationships with these new, state-of-the-art integrated multi-sense devices. Beyond our collaboration and engineering skills, Dexter also brings small-batch and volume manufacturing capabilities to any relationship.
A Dexter Thermacon PIR motion sensor will detect an intruder, light a room, reduce heating and cooling costs, trigger video surveillance, or grant a request to exit, depending on its assigned task.
Contact us to ask any question, develop specifications for a proposal, or get your project started now.