Chemitec S470 MultiprobeOxysmart: Ammonia-based Aeration Control

A control algorithm added to a Series 50 controller, combined with the S470 multi-probe and the 423C Optical D.O. probe provides ammonium-based aeration control (ABAC).

The Oxysmart bring ammonium-based aeration control to your activated sludge lanes.

AS Bioscope Oxysmart is a control algorithm. It is based on the proven theory that it is possible, in a municipal treatment plant, to control the activated sludge treatment process by monitoring the concentration of ammonium.
The Oxysmart 50-series is installed at the basin and is operational from the moment of installation. The logic is adaptable to any plant, regardless of the electro-mechanical equipment, to optimize the operation.
Loaded on a 50-series Controller, this algorithm transforms the control unit into a system capable of managing compressors, VFDs and mixers, to optimize the process and adapt to load variations.
The OxySmart works by continuously adjusting the oxygen set-point based on the load and reduction of ammonium as detected by the included ammonium-ion selective S470/NH4 probe. A Chemitec optical D.O. probe (also included) monitors the achievement of the target O2 level.



Measuring Range NH4+ 0 to 100 ppm
Measuring Range K+ 0 to 1000 ppm
Measuring Range NO3- 0 to 100 ppm
Measuring Range CL 0 to 5000 ppm
Measuring Range Temperature 0 to 50°C
Measuring method Ion Selective Electrodes
Precision ±1 mg/L or ± 1%
Response 90% of the value in less than 60 seconds
Refresh Time maximum less than 1 second
Operating pH range 4 to 10 pH
Temp. compensation with internal NTC probe
Operating temperature 0 to 50°C
Maximum pressure 1 bar
Body material AISI 316
O-ring NBR
Protection, electrodes housing and superior cap Black PVC
Mechanical protection IP68 Sensor+cable
Power supply 12 ÷ 24Vdc
Cable 10m submersible
Signal interface Modbus RTU Standard Protocol


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