Markland Company has been working on sludge level measurement since 1970s, and has accumulated 

decades of experience.

Main features:

-Reliable principle of beam caliper measurement

-The measurement is stable and accurate, and is not affected by sludge concentration, sludge composition 

and rake frame.

-Linear output of 4-20mA, corresponding to the mud level height of sludge.

-Won the North American Award for Excellence in Environmental Science and Engineering (Equipment), 

and UNEP recognized its outstanding technical design ideas.