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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <strong>仪器简介：</strong></p><p><p>订货指南� </p><p> 系统包括：CR1000数据采集器、SF-L33探针、SF60延长电缆、SF30稳流电源、防水箱、主机电源、SF40安装工具、软件和操作手册等。通常与DD型茎杆生长仪配合使用，可得到准确零点茎流� </p><p> 产地：德国Ecomatik公司</p></p><p><strong>技术参数：</strong></p><p><p>性能指标� </p><p> 探针� </p><p> 型号：SF-L33，需3个单端通道 </p><p> 针长�?3/20mm </p><p> 组成�?针式 </p><p> 电缆长度�?m，可延长�?0m </p><p> 适于树径９�20cm </p><p> 耗电�?.2W�?4mA，直流，(耗电极低) </p><p> 输出�?100-1000uV </p><p> SF30 稳流电源：可�?个SF传感器提供恒定电� </p><p> 数据采集器： </p><p> 数据采集器：Campbell数据采集� </p><p> 电源�?2-15V直流 </p><p> 基本输入: 32差分通道，可连接32个TDP30探针 </p><p> 通道扩展: AM16/32 继电器多路器�?多可�?28个TDP30探针 </p><p> 基本存储:2M�?00�?00个数据，*�?00� </p><p> 通讯: 9针RS232串口</p></p><p><strong>主要特点９�/strong></p><p><p>在植物生理学，水文循环和地面能量平衡研究中，流经植被的水�?蒸腾)是一个关键的研究对象。植物水分消耗必然与其生长和生存相关。反过来，蒸发的水量又直接影响与水分可用性有关的植被形成进程。因此，许多应用领域的研究人员对植物水分利用的速率非常感兴趣。SF-L植物茎流仪是在Granier**设计基础上改进的测量植物茎流的探针式仪器。其优点在于� </p><p> 可以直接测量得到茎流的零� </p><p> 消除茎杆纵向温度梯度，使得精度大大提� </p><p> 工作原理� </p><p> 这个植物茎流测量仪采用TDP热耗散传感器原理，包括4个探针�?*和第二个探针插入植物茎杆上下不同部位，上部探针用恒定电流加热，两个探针之间形成温差。水流上升时，带走热量，两个探针之间温差变小。温差和茎流之间具有函数关系，通过测量温差算出茎流。第三和第四个探针测量茎杆纵向温度梯度，用以修改**和第二探针之间非茎流带来的温差、�/p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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