The AJ-SR04M V3.0 is an upgraded waterproof ultrasonic rangefinder module. It consists of an integrated ultrasonic probe (sealed in a metal housing) and a separate control circuit. Unlike the standard JSN-SR04T, the V3.0 is more stable, has a smaller “blind zone” (minimum distance), and supports multiple output modes. Whether you are building an automated irrigation system or a car parking sensor, this module ensures reliability even in rain, dust, or humid conditions.
Key Features
Waterproof Probe: The sensor head is fully sealed, making it suitable for wet and dusty environments (the control board must be kept dry).
Wide Range: Accurate distance measurement from 20cm up to 450cm.
High Precision: Offers millimeter-level resolution with minimal interference.
V3.0 Stability: Improved signal processing reduces “jitter” compared to older V1.0 or V2.0 modules.
Standard Interface: Uses the same Trigger/Echo pins as the HC-SR04, making it 100% code-compatible.
Technical Specifications
Feature
Specification
Operating Voltage
3.0V to 5.5V DC
Operating Current
< 30mA
Measurement Range
20cm – 450cm
Resolution
Approx. 0.5cm
Sensor Angle
< 50 Degrees
Probe Lead Length
~2.5 Meters
Blind Zone
20cm (Minimum distance)
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