Waterproof Ultrasonic Distance Sensor (27~800cm, ULS)

Water-proof Ultrasonic Sensor (ULS) is a high‑performance ultrasonic distance measurement module designed with an enclosed waterproof probe for reliable operation in demanding environments. Based on ultrasonic echo ranging, this long‑range distance sensing unit determines target distance by measuring the time interval between transmitted sound pulses and received echoes, enabling accurate non‑contact measurement. The sealed ultrasonic ranging module supports detection of transparent objects, metals, non‑metals, liquids, solids, and granular materials. A specially designed bell‑mouth acoustic structure improves sound wave directivity and stability, making this industrial‑grade ultrasonic detector suitable for outdoor monitoring, robotics navigation, and environmental measurement systems.

Note: the internal probe surface is regarded as the detecting starting point by default. If the plane of the bell-mouth is used as the starting reference, subtract 40mm from the measured distance.

Sealed Waterproof Probe for Harsh Environments

An enclosed waterproof ultrasonic probe enables stable operation in outdoor and industrial environments where moisture, dust, or splashing liquids may be present. This rugged distance sensing module offers a high degree of protection compared with exposed ultrasonic transducers. The sealed acoustic head and durable structure allow reliable long‑term measurement in applications such as tank level monitoring, outdoor robotics, and environmental sensing systems where conventional open ultrasonic modules may struggle.

Stable Ultrasonic Beam with Bell‑Mouth Acoustic Design

A uniquely shaped bell‑mouth acoustic shell improves the directionality and consistency of emitted ultrasonic waves. This engineered structure focuses the ultrasonic beam and reduces signal dispersion, resulting in more stable echo reception and improved ranging reliability. Such directional optimization enhances measurement performance in complex environments where reflections or surrounding objects may interfere with weaker or poorly directed ultrasonic signals.

Figure: ULS Beam Directionalities Diagram

High Accuracy Ranging with Temperature Compensation

This ultrasonic ranging sensor supports millimeter‑level resolution and integrates high‑precision temperature output for compensation. Temperature changes affect sound velocity in air, which can influence measurement accuracy in outdoor or industrial environments. Built‑in temperature sensing enables compensation algorithms to maintain consistent distance readings, supporting reliable performance in applications such as liquid level monitoring, robotics positioning, and automated inspection systems.

Flexible Interface Outputs for System Integration

Multiple output modes simplify integration with embedded controllers and automation systems. The ultrasonic measurement module supports serial communication, PWM output, and switch output modes, enabling compatibility with a wide variety of control boards and industrial monitoring devices. Such flexibility allows integration into robotics navigation platforms, environmental monitoring equipment, and custom automation systems without complex signal conversion.

Figure: Dimension Diagram

Reliable long‑range detection, waterproof construction, and flexible output interfaces make this ultrasonic distance measurement module suitable for liquid level monitoring, smart agriculture equipment, outdoor robotics, industrial automation, and environmental sensing systems. The combination of stable beam directionality and temperature‑compensated ranging enables dependable performance across a wide range of measurement scenarios.