ORCA - Sonar Bed Level System
Principle of Operation
The ORCA Sonar Bed Level transducer emits a high powered acoustic pulse,
which is reflected from the interface density selected. The reflected
signal is processed using specially developed software algorithms, that
eliminate lighter floating densities and stratified layers, allowing
measurement of "RAS" or "BED" levels. It can be calibrated to measure
lighter densities like "FLOC" or one of the outputs could be used for a
"CLARITY" output, similar to a basic turbidity transmitter measuring
solids in suspension.
By choosing the correct sonar transducer frequency, the ORCA sonar
guarantees the optimized performance when measuring both light and heavy
Primary Areas of Application
* Sewage & Wastewater
Primary Sedimentation - Blanket level
Secondary and final Clarifiers - RAS Blanket and fluff/pin floc layer
Thickeners and DAF - Bed level and clarity of water
Sequential Batch Reactors - Blanket monitoring (floating sonar)
Lagoons - Bed sludge level
Lamella Clarifier - Bed level and floc level
* Mining / Process
Clarifiers, thickeners, CCD's, settling ponds/lagoons, water treatment,
* Dual independent analogue outputs to track two different interfaces,
or clarity simultaneously, with the one sonar sensor.
* Full range of sonar transducers to optimize
detection of heavy and light density interfaces.
* Widest range of sonar frequencies to optimize performance.
* Easy calibration to track specific density interfaces. eg: RAS
blanket - 4g/l, floc/fluff layer - 1g/l.
* Industrial scum cleaning mechanisms, that do not require maintenance.
* No wiper blade assemblies.
* Control room graphics of tanks and interfaces.
* Wide range of communications:
Devicenet, GosHawk, HART, Modbus, Profibus DP, Foundation Fieldbus and
* CDMA/GSM remote support capability for calibration, commissioning or
* Relay alarms