RangeFinder - Model SM-140 -Ultimate Stand-Alone Sensor
The Miros RangeFinder is the ultimate stand-alone sensor for airgap, tide, water level, draught and wave measurements. RangeFinder is a dry, radar-based sensor, measuring with millimetre accuracy in all weather conditions. The sensor is available with motion compensation for use on floating assets, where it is the only DNV GL-certified product on the market for alpha-factor related wave monitoring. The RangeFinder is also available with Atex IEC Ex certification for use in Zone 1.
The Miros RangeFinder is a high-frequency vertical microwave radar providing sea level, tide, non-directional wave monitoring, ride control and air gap measurements. The measurement principle provides accurate measurements undisturbed by fog, rain and water spray (unlike laser sensors). The RangeFinder is available as an IoT-based sensor meaning that it is truly plug-and-play, only needing power and an internet connection to give secure access to immediate, real-time data about the ocean state. The RangeFinder is now available with Atex IEC Ex certification for use in Zone 1.
- Operability improvements up to 15%
- Increased operational safety
- Real-time data delivered to any device
- Historical weather data available to all stakeholders
RangeFinder emits a microwave frequency modulated (FM) chirp signal and receives the echo from the water surface. The signal propagation delay given by the distance from the antenna to the water surface causes a beat signal in the receiver.
By means of advanced signal processing, the beat frequency is converted to an accurate distance. The FM chirp is generated by a digitally synthesised frequency sweep oscillator with absolute frequency linearity and high stability. The sensor, therefore, provides accurate range measurements and high long-term stability.
Up to 50 measurements per second are averaged over a user-selectable averaging time and the distance to the surface can range from 1 to 100 meters which is superior to what any competing product can offer.
The Miros RangeFinder is a dry sensor, meaning no parts are submerged in water. It measures with millimetre accuracy (+/- 1mm) in all weather conditions, undisturbed by fog, rain or water spray. RangeFinder is a stand-alone sensor with embedded processing and storage, enabling data to be easily and securely accessed both locally and remotely using modern IoT technologies.
NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS) conducted a 3-month field study comparing radar-based water level sensors. They found that the Miros RangeFinder is the optimal choice for wave measurements.
