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Sludge Sleuth - Single Point Sludge Blanket Level Detector
Markland’s simple and effective single point monitoring and automatic control to maintain your preferred sludge blanket and supernatant interface level.
Single point monitoring and automatic control of the depth of settled beds
- Beneficial wherever solids are separated from liquids
- Well-suited for municipal and industrial applications.
Optical sensor is ideal for diverse clarification equipment
- LED beam provides accurate readings, even in obstructed/constricted areas such as the inclined plates of lamella separators.
Maintain your preferred sludge blanket and supernatant interface level
- Adjustable solids concentration set-point helps maintain optimum equipment performance
- Help avoid process upsets such as septic sludge conditions, carryover from clarifiers, solids wash-out through DAF unit baffles.
Optimize silt or sludge feed density for enhanced dewatering
- Maximize water removal and avoid pumping large volumes of thin sludge.
- Help reduce energy and haulage costs, and improve outflow for reuse.
Simple installation
- Compact probe design; muffler-style mounting clamps; NEMA 4X enclosure.
Adjustable damping control enables operators to modify the response-time setting
- Staff are alerted when the true settled bed is detected and pumps/valves activated.
Accommodate changes in sludge density
- Sensitivity control allows operators to make adjustments for thin or thick sludge and slurries, or light flocs.
Optional delay-off timer is available to help you fine-tune your control
- Access the added advantage that helps reduce wear-and-tear on pumps.
Get answers when you have questions
- Technical assistance is factory-direct from the designers and manufacturers of this sludge blanket level control equipment.
Single point detection of settled bed levels in:
- gravity settlers, including circular and rectangular clarifiers
- sedimentation basins
- inclined plate clarifiers
- decanting tanks
- DAF units (dissolved air flotation tanks)
- SBRs (sequential batch reactors)
- batch processes
- sumps and pits.
This list provides a few examples of the material able to be detected by this Markland product:
- primary and secondary silt, sludge, biosolids
- backwash sludge from sand or membrane filters
- resin in water softener intake tanks
- settled mud in tanks
- flyash from scrubbers
- grit in sumps and pits.
- Simple installation
- No moving parts
- Compact design makes it ideal for obstructed/constricted applications, such as lamella clarifiers
- Adjustable sludge concentration set point control enables LED beam intensity to be modified to detect liquid-solids interface levels in thick or thin sludges, or in light flocs
- Adjustable response time or damping
- Sludge relay indicates that sludge has been detected by the probe
- Advanced self-diagnostics
- Optional delay-off timer
The optical probe of the Sludge Sleuth™ is located at the preferred high level point at which the sludge bed is to be detected. Every second, a LED transmits a pulse of infrared light across a gap in that probe. A phototransistor sensor on the other side of the gap receives the beam of light, measuring and monitoring the concentration of that silt, sludge, slurry or light floc. If the gap contains air or clear liquid, the detector reads the suspended solids concentration as zero. However, when suspended solids are encountered in the gap, some beam energy is absorbed. When the Sludge Sleuth™ reads that the solids concentration has reached the predetermined set-point, it illuminates a LED on its controller and activates a relay that can be used to send an alert to the operator and/or turn on the desludge pumps or valves.
A sensitivity control allows operators to make adjustments for thick or thin sludge and slurries, or light flocs.
An adjustable damping control enables operators to modify the response-time setting, customizing the period in which the pre-determined solids concentration set-point must be continuously present before the meter takes action.
The Sludge Sleuth™ probe is monitored by self-diagnostics, which turn on local and remote alarms in the unlikely event of a problem with its operation.
A NEMA 4X enclosure allows the meter to be installed anywhere except hazardous locations.
Markland also offers Automatic Sludge Blanket Level Detectors that track the liquid-solids interface level as it rises and falls.
Materials
- Probe: PVC
- Mast: 1″ PVC pipe
- Clamps: Stainless steel and polypropyline
- Cable: PVC jacketed
- Enclosure: Polycarbonate NEMA 4X (IP68)
- Dimensions: Width: 6.3″ (16 cm) Height: 6.3″ (16 cm) Depth: 3″ (7.6 cm)
- Cable Length
- 33′ (10 meters)
- Power: 110/220 VAC, 50/60 Hz, 5 watts
- Output:
- LED indication
- SPST 1 Amp solid state relay for sludge indication
- SPST 1 Amp solid state relay for fault indication
This animation shows the Sludge Sleuth - Markland’s single-point sludge blanket level detector - at work. The rising sludge bed approaches the detector’s probe. As the sludge bed which flows into the probe gap, reaches the predetermined concentration set-point:
- the green LED on the controller lights up
- the SPST 1 Amp relay closes, turning on the desludge pump or valve and/or sending a notification to the operator.
