Infrared sensors can be largely divided into "thermal" and "quantum" types based on their operational principles. Thermal sensors convert infrared rays into heat which is then changed to a resistance change and thermoelectromotive force to extract the output. Quantum sensors use the photoconductive effect based on the transitional energy of semiconductors and the photovoltaic effect in PN junctions.
Pyroelectric infrared sensors fall under the thermal type of sensors.
Human body detection is one application of pyroelectric infrared sensors, but largely speaking there are three types of human detection sensors, and pyroelectric infrared sensors fall under passive sensors.
We compared the different types of sensors which are capable of detecting human bodies based on their operational principles and detection features. Each type has its advantages and disadvantages depending on the operational principles, movement that you wish to detect, area, location where it is equipped, and the installation location, etc.
The pyroelectric infrared sensors offered by Murata can largely be divided into the following types.
The dual type commercializes high-sensitivity and dual type sensors for sets used outdoors.
Dual type and Quad type
Each type also includes a lineup of RFI suppression products which emphasize their respective electromagnetic wave resistant characteristics.
*Please inquire about products with different output types.