Generate a perfectly fitted, 3D-printable case for your Generic HC-SR04 Ultrasonic Distance Sensor. Verified 45x20mm base dimensions with Above-board dominated by the 16mm transducer diameter + 1mm bezel.
Passive ultrasonic sensor draws ~15mA @ 5V — negligible thermal output. No ventilation required; primary enclosure concern is the transducer aperture geometry, not airflow.
PLA is adequate for indoor installations with no thermal load. PETG is preferred for semi-outdoor placement (better UV resistance and moisture tolerance). ABS offers weld-assembly for multi-part housings and resists environmental cycling.
Transducer apertures must NOT be covered — even thin films attenuate the 40 kHz acoustic signal.
Minimum 3° acoustic cone clearance — enclosure walls within 10mm of the transducer face can cause false echoes.
4-pin header is fragile; provide cable strain relief at the enclosure entry to prevent pin fatigue.
Enclose the PCB but expose ONLY the transducer faces — mechanical support around the transducer bodies prevents axis drift.
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Mechanical properties are estimates. Validate critical loads before use.