Advanced Turbidity Optical Sensing for SeaGuard Applications
The Aanderaa Optical Turbidity Sensor 4296 is the newest model replacing the previous Turbidity Sensor 4112 and detects infra-red light scattered by particles suspended in water. Designed for SeaGuard applications, this sensor fits directly onto the SeaGuard Top end plate using one of the four analog channels or via cable connection to SeaGuard or SmartGuard Datalogger.
- Optically Confined Sensing Volume: Insensitive to ambient light when underwater.
- Superior Optics and Calibration: Multi-point calibrated and temperature compensated, providing a range of 0-2500 FTU with a resolution of 0.02 FTU, back-traceable to international standards.
- Internal Processing: All processing and calculations are internal, with direct readout of engineering data.
- Robust and Reliable: Built on the successful Oxygen Optode backbone, featuring a titanium housing rated for depths up to 6000 meters and a scratch-resistant sapphire glass window.
- Low Power Requirements: Ideal for applications with battery drain concerns.
- Versatile Output Formats: Available with AiCaP CANbus, RS-232, and serial outputs (RS232 or RS422 for long cables).
- Easy Integration: Smart Sensor for seamless integration with SeaGuard and SmartGuard systems.
- Temperature Compensation: Enhanced temperature compensation and included temperature measurement.
- Selectable Depth Ranges: Available in 300, 3000, and 6000 meters depth ranges.
Turbidity Measurement
Turbidity is the optical property of water that causes light to be scattered by suspended particles. High particle concentration causes high turbidity. By establishing the relationship between turbidity and the local suspended matter, this measurement can be used for assessing the concentration of suspended matter. The Turbidity Sensor 4296 measures the backscatter of infrared light. A high-efficiency light-emitting diode transmits modulated light into the water. The backscattered light is picked up by a sensitive photodiode, and this signal is then conditioned, linearized, and converted to data in engineering units (FTU).
Enhanced Performance and Reliability
The Aanderaa Optical Turbidity Sensor 4296 provides better stability, wider range, and improved resolution compared to its predecessor. Its rugged and robust design ensures low maintenance needs, making it suitable for deep-water applications where traditional sensors may fail.
The unique optical design confines the sensing volume to within 5cm of the sensor, allowing for near-bottom measurements and minimizing errant reflections in restricted spaces. This measurement technique is known to correlate well with the amount of suspended matter in water, making it useful for monitoring sediment, algae, or particle pollution.
Applications
- Pollution Monitoring
- Water and Wastewater Quality
- Sediment Transport
- Ocean Profiling
- River and Stream Monitoring
Upgrade Information
The Aanderaa Optical Turbidity Sensor 4296 replaces the older Turbidity Sensor 4112 and offers significant advancements in optical performance, calibration accuracy, and overall sensor robustness. Users of the older model are encouraged to upgrade to the new 4296 model to benefit from these enhancements.
