Accurate measurement of wave height, tide variation, and water-surface displacement is essential across coastal engineering, hydrodynamic laboratories, environmental monitoring, flood warning systems, tank and reservoir monitoring, and marine infrastructure assessment. Traditional contact-based sensors often suffer from corrosion, fouling, and mechanical wear in marine environments — limitations that the Sonic Wave Sensor RV addresses through a non-contact ultrasonic measurement approach.

The sensor supports wave, tide, and water-level measurements with a maximum operating range of 2.5 meters and provides submillimeter wave measurement capability. It is available with RS232 or RS485 communication, optional 0–5 V analog output, and supports synchronized arrays of up to 8 sensors on a single RS485 network.

The Sonic Wave Sensor RV measures wave motion and water elevation without contacting the water surface. The manufacturer datasheet identifies the following core feature set:

• ✓Ultrasonic non-contact sensing — measurements taken without any submerged element.
• ✓IP67 waterproof housing — full dust ingress and immersion protection.
• ✓Anti-aliasing sensing circuit — automatic 64 Hz internal filter improves signal quality.
• ✓RS232 or RS485 communication — point-to-point or multi-drop multi-sensor networking.
• ✓Optional 0–5 V analog output — direct integration with PLC, SCADA, and DAQ systems.
• ✓Configurable sample rates — six selectable rates from 1 Hz to 32 Hz.
• ✓Continuous or burst sampling modes — match acquisition strategy to power and data budget.
• ✓Time-tagged synchronized data — every sample marked with the on-board RTC.
• ✓Real-time clock synchronization — host-driven time alignment across the array.
• ✓Automatic calibration — supplemented by optional 12-point in-situ calibration.
• ✓Submillimeter wave measurement — 0.1 mm resolution in binary float mode.
• ✓Up to 8 synchronized sensors — on a single RS485 network for spatial array studies.

The Sonic Wave Sensor RV operates using the ultrasonic time-of-flight principle. The sensor emits an ultrasonic pulse toward the water surface and measures the return echo time. Distance is calculated from the speed of sound in air and the measured round-trip travel time:

• ✓No biofouling — no submerged surface for marine growth to accumulate on.
• ✓No corrosion — particularly valuable in saltwater and aggressive industrial fluids.
• ✓No mechanical wear — no moving parts in contact with the measured medium.
• ✓No electrical exposure to water — improves long-term reliability and safety.

The OSSI-010-036 delivers submillimeter resolution alongside a wide power input range and flexible sampling — making it equally well-suited to laboratory bench setups, industrial control panels, and remote solar-powered installations.

Configurable sampling rates:

The Sonic Wave Sensor RV is available in six factory configurations covering the combinations of communication interface, analog output, and accuracy class. The "E" suffix indicates an enhanced-accuracy variant.

Choose the RS485 variants for multi-sensor arrays and longer cable runs; RS232 variants for simple point-to-point host integration; and the "E" enhanced variants when laboratory-grade accuracy is required.

The datasheet divides the operating range into five performance zones (A–E) classified by wave-steepness tolerance. Selecting the correct zone for your application is essential to achieving expected accuracy.

Excessive wave steepness may temporarily cause lost samples. During such conditions, the sensor outputs the last valid reading until a new valid sample is detected — preserving data continuity for the host system.

The Sonic Wave Sensor RV supports both digital and analog interfaces, giving deployment engineers flexibility to match the host data acquisition system.

The sensor supports four data output formats, each suited to a different host integration pattern:

Each record includes device ID, sample rate, battery status, timestamp, and wave samples:

The Sonic Wave Sensor RV supports both factory calibration and in-situ user calibration. Up to 12 calibration points can be configured for enhanced accuracy across the full measurement range.

Typical multi-point calibration positions span the working range:

Enhanced-accuracy models can achieve approximately 0.05% full-scale calibration performance under controlled conditions — making the RV suitable for laboratory precision studies.

• ✓Real-time plotting — live trace visualization for one or multiple sensors.
• ✓Spectral analysis — wave spectra, significant wave height, frequency-domain plots.
• ✓Data logging — record live streams to disk for post-processing.
• ✓Device configuration & calibration setup — set sample rate, format, filter, and multi-point calibration.
• ✓Wave-height & mean water level analysis — built-in statistics for engineering reporting.

The Sonic Wave Sensor RV is well-matched to coastal engineering, hydraulic research, flood monitoring, and industrial liquid-level applications — particularly where non-contact measurement and wired multi-sensor synchronization are valuable.

Recommended installation practices for optimal sensor performance:

• ✓Maintain a clear ultrasonic path — keep the beam zone free of obstructions to ensure consistent echo return.
• ✓Avoid nearby reflective structures — walls, beams, and pipes near the beam can cause spurious echoes.
• ✓Install above maximum water level — the sensor must remain dry across the full operating range.
• ✓Use RS485 for multi-sensor systems — differential signaling supports longer cable runs and noise rejection.
• ✓Enable anti-aliasing for wave studies — leverage 64 Hz internal filtering for clean spectral content.
• ✓Select sample rates based on expected wave frequencies — follow the 8× rule for the highest wave frequency of interest.

Operational considerations:

• !Range restriction: The 2.5 m maximum range may limit use in deep reservoirs, high bridge installations, or offshore deep-water applications.
• !Atmospheric sensitivity: Performance may be influenced by heavy rain, spray, wind turbulence, and temperature gradients — installation should consider these factors.
• !Wave steepness limits: Breaking or extremely steep waves may result in intermittent sample loss; the sensor reports the last valid reading until valid data resumes.