The HACH/GLI Hash Dissolved Oxygen Analyzer from the United States is equipped with a GLI5500 dissolved oxygen probe and uses Clark polarographic cell technology. It consists of a three sensor system consisting of a gold sensor, a negative sensor, and a silver reference sensor.

The use of a constant voltage for polarization of the silver reference sensor has played a role in stabilizing measurement values, avoiding interference from traditional two sensor systems, and enabling the GLI 5500 dissolved oxygen probe sensor to have high accuracy and stability.

The American HACH/GLI Hash Dissolved Oxygen Analyzer [Polarography] 5500 Dissolved Oxygen Probe adopts an integrated replaceable membrane head component, each component has pre installed membrane and electrolyte, simplifying the tedious work of replacing new membranes and electrolytes.

The HACH/GLI Hash Dissolved Oxygen Analyzer in the United States uses three sensor Clark measurement technology for the dissolved oxygen sensor, which enables the sensor to have high accuracy and stability. Optional air self-cleaning system.