Description
The Spectral Absorption Coefficient (SAC) at 254 nm helps to determine the Organic Content of a water sample. It also correlates with COD, TOC and BOD parameters by applying the appropriate correlation coefficients.
MONITORING APPLICATIONS
- Urban wastewater treatment: detecting organic load variations during input / treatment process / output.
- Industrial effluents treatment
- Surface water monitoring
- Fish farming, aquaculture (freshwater)
- Drinking water: organic matter monitoring in raw water, oxidation process, coagulation, activated carbon filtration.
MEASUREMENT PRINCIPLE
The StacSense probe uses UV absorption at 254 nm to measure organic compounds dissolved in water. This absorbance is correlated with the concentration of TOC, COD and BOD to provide a high-performance probe requiring no consumables. A reference measurement at 530 nm is used to compensate for the presence of particles in the sample that also absorb UV light and to establish the Turbidity parameter. The use of a state-of-the-art high-performance UV LED, combined with rigorous ignition management, offers an optimal variance of the signal.
DIGITAL COMMUNICATION / BUILT-IN TRANSMITTER
The StacSense sensor connects to any type of recorder, transmitter, remote management system or PLC using a Modbus RS-485 input. As a result of sensor indexing, more than 200 sensors can be connected to a recorder. Interference-proofing: pre-amplification built into the sensor and digital signal processing. All calibration, history, user and measurement data are processed directly in the StacSense Probe and transmitted by a Modbus RS-485 or SDI-12 link.
TECHNICAL CHARACTERISTICS
- Measurement principle: UV 254 nm absorption
- Compensation: Turbidity at 530 nm, internal temperature
- Wave lengths: 254 nm (turbidity correction at 530 nm)
- Type of detector Silicon: photodiode
- Light sources: LEDs UV 254 +/- 5nm and 530 +/- 5 nm
- Optical paths available: 2 and 50 mm
- Measurement frequency: maximum 1 measurement / 2s
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