GB/T 18185-2014

This standard specifies the reliability requirements, test methods, and assessment criteria for hydrologic instruments used in monitoring water levels, flow rates, rainfall, and water quality. It is applied in the design, manufacturing, and quality verification of instruments such as water level gauges, current meters, and rain gauges used in hydrological stations, flood warning systems, and water resource management. The standard ensures these instruments maintain accurate and stable performance under harsh field conditions, including prolonged exposure to moisture, temperature fluctuations, and mechanical stress.