These human sensor modules are small in size, and feature low power consumption and nicely anti-interference, with internal digital signal processing and direct high and low level output. The AM312 human sensor module is a digital intelligent automatic control product that is based on passive body infrared technology, which is highly sensitive and reliable to use. They are widely applied for all kinds of automatic induction electrical equipment. After high sensing output, during the delay time, if a human body is active within its sensing range, its output keep high until the delay after the people leaves, then it become low, Weight: 0.1653466965 Pounds, Manufacturer: Kueohse