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

This waterproof ultrasonic distance sensor provides reliable non-contact range finding from 27cm up to 800cm with precise 1mm resolution. Featuring built-in temperature compensation and multiple output modes, it is well suited to makers, students, and engineers developing outdoor robotics and level-sensing projects.

Waterproof probe construction

The sensor features a sealed, waterproof probe designed for damp or exposed operating conditions. This makes it ideal for outdoor obstacle detection, tank monitoring, and weather-exposed automation.

Wide measuring span

It accurately measures target distances across an extended range of 27cm to 800cm. This broad span accommodates diverse sensing tasks from close-proximity navigation to long-range detection.

Millimetre-level resolution

With a fine 1mm resolution, the unit provides accurate and detailed distance feedback. This ensures precise tracking for automation and measurement systems.

Integrated temperature compensation

Built-in temperature compensation automatically corrects for changes in ambient temperature that alter the speed of sound. This ensures consistent reading accuracy across fluctuating environmental conditions.

Multiple interface options

The sensor provides UART, PWM, and switch signal outputs for straightforward connection to microcontrollers. This flexibility allows easy integration into Arduino, ESP32, or industrial control platforms.

Downloads & documentation

• Product wiki (DFRobot)