Waterproof Ultrasonic Obstacle Sensor, Reversing Radar Sensor with Separate Probe

Product Description The JSN-SR04T is an industrial-grade waterproof ultrasonic distance sensor designed for reliable performance in harsh outdoor environments. Unlike the standard HC-SR04, this module features a separate, fully sealed waterproof probe connected to the driver board via a generous 2.5-meter cable. This design allows you to mount the sensitive electronic controller safely inside a dry enclosure while the probe remains exposed to rain, dust, or water splashes. Operating on the principle of sonic echolocation, it is the standard choice for vehicle reversing radars, water tank level monitoring, and outdoor security systems. It integrates effortlessly with Arduino, ESP32, and Raspberry Pi using the same triggering logic as hobby-grade ultrasonic sensors.

Key Features

• Fully Waterproof Probe: The sensing head is hermetically sealed, making it suitable for wet, dusty, and outdoor applications without degradation.

• Separated Driver Board: Allows for flexible installation where the controller is protected from the elements while the probe is mounted at the measurement point.

• Long-Distance Detection: Capable of measuring distances up to 6 meters with high stability and a narrow blind spot of only 20cm.

• Extended Cable Length: Comes with a high-quality 2.5-meter shielded cable, providing ample reach for large vehicle or industrial tank installations.

• High Reliability: Features high-precision processing circuitry that filters out environmental noise for consistent distance readings.

Technical Details

• Operating Principle: Emits a 40kHz ultrasonic burst and calculates distance by measuring the time-of-flight of the reflected echo.

• Trigger Input: Requires a 10-microsecond TTL pulse on the 'Trig' pin to initiate the measurement cycle.

• Echo Output: Sends a high-level TTL pulse on the 'Echo' pin, where the pulse duration is proportional to the distance.

• Integrated Shielding: The probe cable is shielded to prevent electromagnetic interference from nearby motors or power lines.

• Quiescent Current: Features an ultra-low standby current of less than 5mA, making it efficient for continuous monitoring.

• Blind Zone: Designed with a minimum sensing distance of 20cm; objects closer than this may yield unstable results.

• Angular Sensitivity: Provides a wide detection angle of approximately 75 degrees, ideal for reversing radar and wide-area coverage.

• Housing Material: The probe is encased in a corrosion-resistant metallic housing with a 22mm diameter for easy panel mounting.

• Status LED: The driver PCB includes a status indicator that flashes during active signal transmission and reception.

• Internal Calibration: Factory-tuned oscillator ensures the 40kHz frequency is stable across the entire operating temperature range.

• Resolution Performance: Provides distance data with 1cm resolution, sufficient for industrial level and proximity sensing.

• Power Protection: Features reverse polarity protection on the driver board to prevent damage during wiring errors.

• Logic Level Compatibility: Standard 5V TTL interface allows for direct connection to most hobbyist development boards.

• Connector Integrity: The probe connects to the PCB via a secure 2-pin screw-lock or snap-fit connector for vibration resistance.

• Environmental Sealing: The probe is rated for IP66/IP67 protection, ensuring longevity in high-humidity and rainy conditions.