WTW - Model FDO® 700 IQ - Monitoring of Dissolved Oxygen to control aeration on a wastewater treatment plant
The calibration free optical sensor FDO® 700 IQ for dissolved oxygen is optimized for wastewater treatment plants. Due to its innovative 45° membrane cap the sensor avoid false high reading by trapping bubbles. Thus, the possible vertical mounting on a chain enables a self-cleaning effect by oscillating in the flow. The long lifetime of the cap (3-5 years) and its easy and fast change save a lot of work and time. Due to the automatic recognition a manual input of the serial number is not needed (potential source of error).
In combination with the ISE sensors for NH4 and NO3 the controlling can further be optimized.