... , small size, switching signal output For alarm system, proximity switch etc. . Ultrasonic sensor1.TU-001 Ultrasonic sensor consists of ... this setting value, it will output a digital signal to turn on the LED, otherwise it will output a digital signal ... alarm or action also.2. Applications Alarm system, proximity switch etc.3. Parameters ITEMSPARAMETERTOLERANCENOTEVOLTAGE1.Low voltage version DC 5-7V2 ...