Optical sludge level measuring system for sedimentation profile measurement and continuous tracking of sludge blanket

  • Integrated electronics with 2 x 4…20 mA, 3 relays, limit switches
  • 3 measurement modes: profile, sludge blanket/ fluff levels, zone tracking; automatic change of modes possible
  • 0.1…30 g/l; max. 10  m / 32.8 ft
  • Optional automatic flush cleaning unit for low maintenance

OPTISYS SLM 2100 – Standard version

Sludge level measuring system OPTISYS SLM 2100 – Standard version

The OPTISYS SLM 2100 is a sludge level measuring system for measurement of sludge blanket level and fluff levels as well as sedimentation profiles. Using an optical sensor which travels right down to the tank bottom, it detects all sludge phases, supplying precise concentration and level measurements. In this way, it is also able to measure the sludge blanket continuously (zone tracking) and hence monitor one specific "zone" (e.g. for controlling the pumps during de-pumping of the sludge). For an optimised process monitoring, an automatic measuring mode change is possible in which sedimentation profile measurements can be carried out in the meantime. Unlike with ultrasonic sludge level meters, there are no echo returns from tank walls or signal damping by fluff or floating sludge that can cause false measurements.

Product highlights

  • Accurate and colour-independent measurement up to a depth of 10  m / 32.8 ft
  • No interference with fluff or floating sludge
  • Built-in heater and ventilation for temperature regulation
  • Durable stainless steel sensor and instrument enclosure
  • Powder coated IP 55 rated enclosure for outdoor installations
  • Low maintenance due to (optional) automatic flushing of sensor and cable after each measuring cycle
  • Automatic measuring mode change for additional profile detection and optimised process monitoring
  • Common operating and service concept with KROHNE flow and level devices (GDC)

Typical applications

Water and wastewater industry, minerals and mining industry, power industry:

  • Monitoring and optimisation of sedimentation processes
  • Automated de-pumping of sedimentation basins
  • Automation of sludge extraction
  • Early warning of sludge washout
  • Measurement of sludge blanket and fluff zone in primary and secondary clarifiers or sludge thickeners
  • Measurement in tailings thickeners