User Manual

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URM04V2.0 Ultrasonic Ragner Sensor
Introduction
URM04 is developed based upon our popular URM37 ultrasonic sensor. The RS485
interface allows a number of sensors working together. Up to 32 URM04 may be connected
together in a network.
Specification
Power: +5V
Current: <20mA
Working temperature: -10℃～+70℃
Detecting range: 4cm-500cm
Resolution: 1cm
Frequency: 40KHz
Interface: RS485
Units: Range reported in cm
Temperature sensor: 12 bits reading from serial port
Size: 34mm × 51 mm
Weight: 30g
Figure 1: URM04 Beam Width 60 degree