https://www.futureelectronic... . Melexis MLX90632 infrared sensor is based on established far infrared (FIR) technology that utilizes the fact that every object emits heat radiation proportional to its temperature. The ultra-small device includes the sensor element, signal processing, digital interface and optics allowing integration into a wide variety of space-constrained applications. https://youtu.be/th0h-oMG6Wc