QuestionQ127Verified/Systems and Application SecurityCopy linkReport a problemAsk AstroTutorSave questionWhich of the following is not a type of motion detector?APhotoelectric sensorBPassive infrared sensorsCMicrowave Sensor.DUltrasonic Sensor.Show AnswerAnswerExplanationPassive infrared, microwave, and ultrasonic technologies detect movement. Photoelectric sensors instead operate by detecting interruptions or reflections of light.Show comments1Show commentsCommunity DiscussionNo comments yet. Be the first to start the discussion!
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