December 4, 2008 - Analytical Technology announces the optical version of the Q45D Dissolved Oxygen Monitor. The optical system uses the fluorescence quenching technique to measure dissolved oxygen. Combined with Auto-Clean, this ensures accurate and reliable results even in waste water applications. Both galvanic and optical sensors can suffer from reduced reliability due to water quality. The biggest issue with any dissolved oxygen sensor when used in waste water is sensor fouling.
In these environments, maintenance time and cost, are significant factors in the running costs of the monitor. Much more importantly a sensor that is fouled will give incorrect readings and will cause the aeration system to over aerate, this leads to a massive over use of energy. (Studies indicate 12-15% per ppm error in dissolved oxygen)In order to keep the dissolved oxygen system nearly maintenance-free, air blast Auto-Clean system is incorporated into the monitor to remove materials that build up on the sensor membrane. The cleaning cycle is user-selectable to maximise the cleaning effectiveness.
