AJ-SR04M Waterproof Ultrasonic Sensor

AJ-SR04M Waterproof Ultrasonic Sensor

This is the waterproof version of the HC-SR04 ultrasonic distance sensor, which is frequently used in obstacle-avoiding robot projects. The AJ-SR04M shares the same wiring diagram and usage logic as the HC-SR04.

Technical Specifications:

• Operating Voltage: 5V DC
• Standby Current: 5mA
• Operating Current: 30mA
• Acoustic Emission Frequency: 40kHz
• Maximum Range: 4.5m
• Minimum Range: 25cm
• Connection Pins: +5V, Trig, Echo, GND
• Module Dimensions: 41mm x 28.5mm
• Accuracy: ~0.5cm
• Detection Angle: <50°
• Operating Temperature: -10°C ~ 70°C
• Storage Temperature: -20°C ~ 80°C

Documents:

• AJ-SR04M Arduino Example Usage