西门子雷达液位计7ML5440-1GB00-0AA2是依据时域反射原理(TDR)为基础的雷达液位计，雷达液位计的部分脉冲被反射形成回波并沿相同路径返但是考虑到腐蚀及粘附的影响，测量范围的终值应距离天线的至少100mm。对于过溢保护，可定义一段雷达液位计安全距离附加在盲区上。小测量范围与天线有关。随浓度不同，泡沫既可以吸收微波，又可以将其反射，但在一定的条件下是可以进行测量的。回到脉冲发射装置。

西门子雷达液位计7ML5440-1GB00-0AA2配置说明：

7ML54400AA000AB2
7ML54400AA000AC1
7ML54400AA000AC2
7ML54400AA001AA1
7ML54400AA001AA2 
7ML54400AA001AB1
7ML54400AA001AB2
7ML54400AA001AC1
7ML54400AA001AC2

7ML54400AA001AC2
7ML54400AB000AA1
7ML54400AB000AA2
7ML54400AB000AB1
7ML54400AB000AB2
7ML54400AB000AC1
7ML54400AB000AC2
7ML54400AB001AA1
7ML54400AB001AA2
7ML54400AB001AB1
7ML54400AB001AB2
7ML54400AB001AC1
7ML54400AB001AC2

7ML54400HA000AA2
7ML5670-0AB10-0AB0-Z
7ML54400HB000AA2
7ML54400HB000AA2
LR5607ML5440-0HB00-0AA2
7ML5725-2AC12-5AC0+7ML5711-2AA  L=1500mm