thermal type flow switch 

The sensor have L 15mm or 20mm or 30mm r 40mm and 50mm Optional , this   one set of the thermal type flow switch which normally used fo measure only if the   medium  touch the liquid , 
for example  if the pipe is full pipe ,  the sensor ;L is 15mm ,  this can used for DN100 mm
  . if there are any further more  special request ,pls let me  know  .


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