The Spectral Absorption Coefficient (SAC) at 254 nm helps determine the organic content of a water sample
 also the COD, TOC and BOD parameters by applying the appropriate correlation coefficients.

The 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.

The 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  Probe and
transmitted by a Modbus RS-485 or SDI-12 link.

Features

• UV 254 spectral absorption without any reagents or consumables.
• Multi-parameter measurement: SAC254, CODeq, TOCeq & BODeq, Turbidity
• Modbus RS-485 digital communication.
• Automatic Turbidity compensation.