EVERLIGHT ALS-PD50-42C series is the most advanced ambient light sensor. It adopts a large photosensitive area design, and the photosensitive area reaches 8.1mm2. It mainly considers the subject’s skin contact, which is susceptible to interference from skin color, tattoos or hair. The area can increase the recognition ability, and the signal reception is stronger and more stable. Even moving or runners can detect the heart rate in the most real-time and convenient way.

ALS-PD50-42C series products have a current signal output of 0.8 μA (Vr = 5V) under the illumination of 100Lux white light LED. Such excellent photoelectric conversion efficiency can better analyze the light energy signal reflected by the microvessels on the skin surface. The special coating design can effectively reduce the interference of ultraviolet light below 400nm and infrared light above 650nm, reduce the influence of excessive sunlight during outdoor sports, and the detection results are more accurate. The ALS-PD50-42C series can withstand temperatures from -40°C to 85°C and can be used at voltages of 0 to 5V. It also complies with RoHS, lead-free and halogen-free specifications, and is very suitable for wearable applications such as sports watches. The most portable way to capture heart rate information.

The ALS-PD50-42C series of ambient light sensors use the 550nm band for sensing green light, with low signal calculation error and high output current efficiency, which is convenient for detecting heart rate signals, and is especially suitable for wearable applications such as sports watches.