系统功能
采用热扩散技术测量植物茎干茎流速度，特别适用于茎干较粗的树木和高大植物。若配合其它传感器使用，可测量环境因子（空气温湿度，光合有效辐射、土壤温湿度等）影响下的植物茎流。
工作原理
利用Granier热扩散传感器（TDP）原理，把2根热电偶探针直接插入边材，上面的探针包含1个电加热器，下面的探针作为参照，测量加热探针和参照探针之间的温差dT。根据dT和零茎流时的dTm，应用Granier模型，可以直接得到每个时刻的茎流速率，再根据边材面积求出茎流通量。
对于郁闭冠层下长势一致的树木，每棵树只需一个传感器。对于不规则冠层或混合树种，大树的茎流速率在树周不同方向上存在差异，一棵树需要使用多个传感器才能准确测量茎流。直径在75~150 mm的树木，每棵树通常需安装2套传感器；直径在150~440 mm的树木，每棵树安装4套传感器。
系统特点
双探针，Granier砖利设计
探针易插拔，可重复使用
恒温加热，采用热扩散方法，而不是准确度较差的热脉冲方法
可以连续测量（热脉冲方法不可以，有等待周期）
应用案例
（1）西北农林科技大学 秦岭
参考文献
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7.Sullivan, P. L., V. Engel, et al. (2013). "The influence of vegetation on the hydrodynamics and geomorphology of a tree island in Everglades National Park (Florida, United States)." Ecohydrology.
8.Zhang, Y., Y. Shen, et al. (2013). "Characteristics of the water–energy–carbon fluxes of irrigated pear ( Pyrus bretschneideri Rehd ) orchards in the North China Plain." Agricultural Water Management 128: 140-148.
9.Zhou, Y., J. Wenninger, et al. (2013). "Groundwater–surface water interactions, vegetation dependencies and implications for water resources management in the semi-arid Hailiutu River catchment, China–a synthesis." Hydrology and Earth System Sciences 17(7): 2435-2447.
10.赵晓伟, 赵平, et al. (2013). "木荷树干夜间水分补充的季节动态及其与树形特征和叶片生物量的关系." 植物生态学报 37(3): 239-247.
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