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The pyroelectric infrared sensor is an infrared sensor that uses the pyroelectric effect of ferroelectric ceramic and can detect temperature changes. The slight infrared rays emitted from the human body can also be detected sharply. Excelity's PIR modules provide a solution for human body detection. These modules are widely used in automatic doors, light control, automation system etc. Description: - Product Type: HC-SR501 PIR Motion Sensor Module - Operating Voltage range: DC 5-20V - Quiescent Current: <65uA - Trigger for repeating: "L" means can NOT be repeated trigger; "H" means can be repeated trigger(Default repeated trigger) - Delay time: adjustable from 0.3 to 600S - Sensor sensitivity: adjustable - Effectual Angle: <120 degree - Detection Distance : <7m - Board Dimensions: 32mm*24mm Package included: -3pcs HC-SR501 Moulde -3pcs Mounting Bracket