Analytical Technology has launched the optical version of the Q45D dissolved oxygen monitor with auto-clean system.
The company is offering the Q45D dissolved oxygen monitor with a selection of sensors.
The traditional galvanic dissolved oxygen sensor uses a rugged 5ml Teflon membrane to resist mechanical abrasions and tears.
The membrane serves as a barrier to allow molecular oxygen to diffuse into the reaction cell where it is reduced at the working electrode.
This reaction produces a small current that is proportional to oxygen concentration.
The optical system uses the fluorescence-quenching technique to measure dissolved oxygen.
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.
More importantly, a sensor that is fouled will give incorrect readings and cause the aeration system to over aerate, which leads to a massive overuse of energy.
In order to keep the dissolved oxygen system nearly maintenance-free, Analytical Technology's fully integrated 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.
