system function

Developed jointly by the Norwegian Institute of Meteorological Sciences and the Norwegian Survey and Design Institute，The T-200B series rain and snow gauge produced by Geonor is a high-performance product. It can record both real-time precipitation and precipitation at certain time intervals. The standard T-200B has a rain gauge with a capacity of 600mm，andT-200BM and T-200BMD have rain gauges of 1000mm and 1500mm respectively, which can ensure long-term heavy rainfall measurement. Rain gauges can be equipped with up to three sensors simultaneously and equipped with windproof guardrails to ensure the accuracy and reliability of the measuring equipment. The T-200B comes with one sensor as standard.

Can obtain precipitation, snowfall, snow water equivalent, and snow density

working principle

Precipitation is collected inrainThe snow gauge container is weighed using a string vibration load sensor and outputs a frequency. This frequency is a function of voltage, which can be used to calculate rainfall.

This frequency is recorded in the form of a square wave signal and can be easily transmitted.The conversion module provided by Geonor also enables easy integration into various data collection systems. The entire system has no movable parts, greatly reducing system errors.

The rain gauge is equipped with an external device that meets the requirements of the World Meteorological Organization（A rainwater collection bucket with an area of 200cm2 for WMO. Through the conversion module provided by Geonor, T-200B can easily connect to the CR series data collector produced by Campbell Scientific Inc. This product uses antifreeze instead of a heater to ensure the normal operation of the equipment in low-temperature environments, which can prevent the impact of moisture evaporation on measurement data,alsoIt can reduce energy consumption. Due to its simplicity and low energy consumption,The T-200B is very suitable for outdoor use that can only be powered by solar energy.

System features

lexceed25 years of on-site use

lEasy to install and maintain

lCalculate precipitation density

lProven long-term reliability

lNo need for internal heating

lNo moving parts

lCan be connected to most data collection systems

lString type weighing sensor

technical parameter

capacity: 0-600 mm (including antifreeze)

temperature rangeSensor -25-60 ℃ (temperature range can be customized)

Collection area: 200 cm2

temperature drift: 0.001% FS/℃

sensitivity: 0.1 mm

Material ScienceAluminum alloy

accuracy: 0.1% FS

sizeDiameter 390 mm, height 760 mm

Repeatability: 0.1 mm

installThree points fixed on a horizontal base

Application Cases

（1) Ecological Monitoring of Qinghai Lake Surrounding Qinghai Normal University

（2) Institute of Cold and Dry Regions, Chinese Academy of Sciences

（3) Inner Mongolia Agricultural University

（4) Northeast Forestry University

（5) Liaoning Academy of Forestry Sciences

（6) Shenyang Institute of Applied Ecology, Chinese Academy of Sciences

（7) Shenyang Institute of Atmospheric Environment, China Meteorological Administration

major customers

Norwegian Institute of Meteorology, Swedish Institute of Meteorology and Hydrology, Danish Institute of Meteorology, Icelandic Institute of Meteorology, United StatesNCAR (National Center for Atmospheric Research), NOAA/CNN (Climate Research Network), NOAA/ATDD, NOAA/USS (National Meteorological Service), Quebec Hydrological Research Center, Alberta Department of Agriculture, and most of the Nordic countries' hydroelectric companies.

reference

1. Zhao Qiudong, Ye Baisheng, He Xiaobo, Zhang Jian, Zhao Chuancheng. Correction of Daily Precipitation Observation Error of Geonor T-200B Rain and Snow Gauge in Tanggula Mountain Area "Plateau Meteorology Volume 33, Issue 2, April 2014

2. He Xiaobo, Ye Baisheng, Ding Yongjian "Analysis of Precipitation Observation Error Correction in Tanggula Mountain Area of Qinghai Tibet Plateau", Progress in Water Science, Volume 20, Issue 3, May 2009

3. Zhang Wei, Shen Yongping, He Jianqiao, He Bin, Nurlan Hazezi, Xue Jiao, Wang Guoya "Observation and analysis of snow characteristics in different underlying areas during the snowmelt period in the Altay Mount Taishan Mountains." Glacier Frozen Soil, Issue 03, 2014

4. Zhang Bo; Liu Zhihui; Wang Hui; Fang Shifeng;; Analysis of snowmelt water infiltration and simulation of infiltration rate during snowmelt period [J]; Anhui Agricultural Science; Issue 24, 2013

5. Tian Hua; Yang Xiaodan; Zhang Guoping; Zhao Lina;;Analysis of Meteorological Causes of Snowmelt Floods in Xinjiang in Mid March 2009[A]; Proceedings of the 2010 Academic Annual Meeting of the Chinese Water Conservancy Society (Volume 1) [C]; 2010

6. Choi G, Robinson D, Kang S.Changing northern hemisphere snow seasons[J]. Journal of Climate, 2010, 23(19): 5 305-5 310.

7. [Wang Jian, Li Shuo. The impact of climate change on snowmelt runoff in mountainous areas of inland arid regions in China [J]. Chinese Science: Volume D, 2005, 35 (7): 664-670