In the fields of hydrological monitoring, flood prevention and control, and environmental supervision, the accuracy, safety, and convenience of flow velocity measurement directly affect decision-making efficiency and management quality. The handheld radio wave (radar) flowmeter relies on K-band radar technology to achieve non-contact velocity measurement, effectively avoiding the drawbacks of traditional contact measurement caused by water corrosion and sediment interference. At the same time, it has core advantages such as portable operation, safety and reliability. As the core characterization of instrument performance, its technical parameters comprehensively cover key dimensions such as measurement accuracy, applicability, environmental adaptation, and operational support, jointly building an efficient and stable flow velocity measurement system. This article systematically analyzes the core technical parameters of handheld radio wave (radar) current meters, clarifies the performance value of each parameter, and provides professional support for users to understand the applicable scenarios and technical advantages of the instrument.

The core measurement parameters are the foundation for ensuring the accuracy of flow velocity detection, directly determining the measurement capability and data reliability of the instrument. The instrument adopts 24GHz K-band radio wave measurement technology, equipped with a highly sensitive flat narrowband radar probe with a 12 ° radio wave emission angle, and a configuration of 10mW standard transmission power and 18dBm transmission power, which ensures the penetration and detection capability of the signal while complying with relevant radio wave emission specifications. The measurement range covers 0.15~30m/s, which can adapt to the measurement needs of different flow rate scenarios from low-speed streams to high-speed floods; The double standard of measurement accuracy of ± 3% and ± 0.03m/s greatly improves the reliability of data, providing accurate flow velocity data support for both routine monitoring and emergency measurement. The measurement distance of 100 meters enables long-distance non-contact measurement, which not only expands the monitoring range, but also avoids direct contact between measurement personnel and water bodies, fundamentally ensuring operational safety.

The environmental adaptation and protection parameters determine the applicable boundary and service life of the instrument, providing guarantees for stable operation in complex scenarios. The waterproof level of the instrument reaches IP67, which can effectively resist the adverse environmental effects such as rainwater and splashes, and is suitable for wet outdoor work scenarios; The shell is made of ABS resin material, which has excellent impact resistance, heat resistance, low temperature resistance, and corrosion resistance, as well as good electrical insulation, providing personal safety protection for measurement personnel in thunderstorm weather. In terms of temperature adaptation, the instrument covers a temperature range of -30~+70 ℃ for use and storage, and a relative humidity adaptation range of 20%~80%. It can adapt to temperature and humidity environments in different regions and seasons, avoiding measurement errors or instrument failures caused by environmental factors, and ensuring stable operation in various environments such as high cold, high temperature, dry, and humid.

The operation and endurance parameters enhance the convenience and practicality of the instrument, adapting to the needs of single person portable operation. The instrument weighs less than 1kg and supports handheld measurement or tripod fixed measurement (standard). A single person can complete the entire process operation; Equipped with a built-in rechargeable 2800mAh lithium battery, it can be used continuously for 10 hours, meeting the needs of long-term outdoor operations. It also supports multiple charging methods such as AC, car mounted, and mobile power, effectively solving the problem of outdoor power supply. In terms of operational auxiliary parameters, the instrument is equipped with angle sensors and temperature sensors, which can automatically calibrate vertical and horizontal angles without manual settings. One click operation can complete flow rate correction measurement and temperature detection; The Chinese guided operation interface reduces the threshold for use, and can be used without professional training. At the same time, a single machine can store 2000 measurement results, providing convenience for data archiving and management.

The expansion of functional parameters further enhances the adaptability of the instrument to different scenarios and enriches its measurement application value. The instrument has multiple measurement modes, which can achieve single measurement and continuous measurement for up to 30 minutes, adapting to different monitoring frequency requirements; Built in single machine flow estimation mode can estimate the flow of rivers and canals with regular cross-sections, breaking through the limitations of single velocity measurement and providing a convenient solution for flow monitoring. The automatic angle compensation function ensures accuracy under different measurement postures, without the need for manual adjustment of angles, greatly improving the efficiency of field operations and avoiding errors caused by manual angle calibration. These functional parameters, in conjunction with core measurement parameters, enable the instrument to be widely adapted to various water bodies such as channels, rivers, sewage, oceans, as well as flood prevention and emergency monitoring, railway bridge construction monitoring, sewage discharge monitoring, and other diverse scenarios.

The technical parameter system of handheld radio wave (radar) current meter is built around the core requirements of "precise measurement, safety and convenience, and wide adaptability", with various parameters working together and supporting each other. The core measurement parameters ensure the accuracy and reliability of the data, the environmental protection parameters expand the applicable boundaries of the instrument, the operating range parameters improve the convenience and sustainability of the operation, and the functional expansion parameters enrich the application scenarios. It is precisely the optimized configuration of various technical parameters that enables the instrument to avoid many drawbacks of traditional measurement methods and achieve safe and efficient non-contact measurement, making it an ideal equipment for hydrological monitoring, environmental supervision, flood control emergency and other fields.