olemus
infrapunakiirgusel põhinev andur
valve- ja automaatikasüsteemides;
passiivne andur reageerib infrapunakiirgusele,
aktiivne andur kiirgab muutuste avastamiseks
=
a radiation-sensitive optoelectronic component with a spectral sensitivity in the infrared wavelength range

ülevaateid
https://www.elprocus.com/infrared-ir-sensor-circuit-and-working/

https://en.wikipedia.org/wiki/Passive_infrared_sensor

https://en.wikipedia.org/wiki/Thermographic_camera

http://iopscience.iop.org/article/10.1088/1757-899X/149/1/012141/pdf

https://link.springer.com/content/pdf/10.1007/s11465-017-0441-2.pdf

näiteid
https://learn.adafruit.com/ir-sensor?view=all

https://duckduckgo.com/?q=ir+sensor&t=h_&iax=images&ia=images