TU-001 Ultrasonic Sensor Module 1.Product DescriptionTU-001 Ultrasonic sensor consists of a single transmit & receive sensor , working with the application circuit , it can detect moving or static obstacle, and the distance value can be set, if the detected distance less than this setting value, it will output a digital signal to turn on the LED, otherwise it will output a digital signal to turn off the LED.This digital signal can control a relay, buzzer directly, or connected to a alarm system to active a alarm or action also.  2:Applications    Alarm system, proximity switch etc.  3: ParametersITEMSPARAMETERTOLERENCENOTEVOLTAGE1.Low voltage version  DC 5-7V2. Normal voltage version DC 8-16V  FRENQUENCE40KHZ ±1KHz WORKING CURRENT20mA  DETECTING RANGE0.2---1.0M±2cm SIGNAL OUTPUT 0 OR 1 Digital/Switch  Signal