SAK254 and nitrate sensor available for Bürkert's online water analysis system

Burkert Fluid Control Systems
Wednesday, 01 February, 2023

SAK254 and nitrate sensor available for Bürkert's online water analysis system

New sensor modules Type MS08 and Type MS09 are now available for Bürkert’s Online water analysis system Type 8905/8906 offering SAK254 value (dissolved organic substances) measurements and the nitrate content in the water. Both sensors are particularly suitable for your water analysis in drinking and process water treatment.

Sensors for SAK254 and nitrate measurement

Ever stricter regulations require compliance with limit values for certain water parameters in drinking water treatment. For example, the limit value for nitrate in drinking water across Europe is 50mg/l.

In addition, drinking water in areas with extensive agriculture and the associated use of fertilisers is increasingly contaminated with nitrate, which makes it increasingly difficult to comply with the currently applicable limit value. It is, therefore, all the more important to continuously monitor this water parameter, for example with our new sensor Type MS09.

Slowly biodegradable compounds are also found in natural water, but also in drinking water and treated wastewater, e.g. lignins, tannins or humic substances. By using SAK254 sensors, such as our new Type MS08, limit values for dissolved organic substances in the water can also be monitored, thus eliminating the last safety risks for consumers.

Optical absorption measurement

These sensors use the principle of optical absorption measurement. The organic compounds dissolved in the water absorb specific wavelengths in the UV light spectrum. By measuring the absorption, algorithms can be used to determine the concentration of the substances in the water.

Type MS08: SAK254 measurement

Type MS08 sensor uses optical absorption measurement at 254 nm and 530 nm to compensate for turbidity and is implemented using 2 LEDs and a detector. In addition to the SAK254 and turbidity 530 values, the TOCeq, BODeq and CODeq values can also be measured using application-specific correlation.

Key features include:

  • UV absorption measurement at 254 nm
  • Monitoring of dissolved organics in drinking water
  • UV LED technology for long-lasting sensors
  • Nano-coated glasses to reduce maintenance

Type MS09: Nitrate measurement

Sensor Type MS09 uses a xenon flashlight as the light source and can measure the nitrate content with reduced interference using three different detection channels. The nitrate content is determined at 212 nm, the organic matter at 254 nm and the turbidity at 360 nm. This makes the sensor insensitive to cross-influences in the water.

Key features include:

  • UV photometer for nitrate monitoring
  • Reagent-free optical measurement
  • Xenon flash lamp, 3 channels for optical measurement with reduced interference
  • Nano-coated glasses to reduce maintenance

A system for the automatic monitoring of all important water parameters on one platform

Water treatment is a demanding process. This applies in particular to drinking water. When it comes to quality monitoring, “manual work” is still often involved.

With the Bürkert Online analysis system Type 8905/8906, the most important water parameters are measured fully automatically and continuously. In addition to measuring SAK254 and nitrate, other important parameters that can also be monitored using the unit include:

  • pH value
  • Redox potential (ORP)
  • Conductivity
  • Chlorine & Chlorine dioxide
  • Turbidity according to DIN EN ISO 7027
  • Dissolved iron (FE2+)

The modular system can be adapted to your personal application requirements using various measuring cubes, so-called sensor cubes: All parameters in one compact measurement system or as a field unit.

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