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SludgeWatch 8200w² Monitor

The SludgeWatch 8200w² Monitor provides a reliable method of detecting the sludge blanket level in clarifiers and settlement tanks, or increasing levels of suspended solids or sludge density in large range of processes.

Control of the sludge blanket level is essential to ensure discharge consent compliance and efficient control of the treatment process. If the sludge blanket in a settlement tank is allowed to rise close to the surface there is a danger that solids will leave the tank and contaminate the next process stage or be discharged into the water course. Alternatively, if the sludge blanket is not allowed to stabilise or form a blanket or is pumped out too frequently the settlement process does not take place at all and solids will remain in suspension. Additionally there is a danger that thin sludge or water will be pumped from the bottom of the tank into the sludge handling system thus reducing the effectiveness of that process.

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+44 (0)1726 879800

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  • Overview
  • General Specification
  • Sensor Selection
  • Ordering Infomation

The SludgeWatch 8200w² Monitor is suitable for mounting outdoors on the bridge of settlement tanks, as the enclosure is IP65 rated and no outer enclosure is required. Provision must be made for transmission of the output signal to the control system; this is normally possible via spare slip rings. Where this is not possible a radio telemetry option is available, allowing transmission directly to the control system without the need for installation of cables.

Dimensions (hxwxd)185 x 213 x 95 mm
Weight1.4 kg
Enclosure MaterialPolycarbonate
Cable Entries1 x M20, 4 x M16, 1 x USB Type A
Cable Core SizeMax Conductor Cross Section 2.5 mm²
Power Supply85 to 264VAC 50/60 Hz
9 to 36VDC
Power Rating0.8A
Environmental Data
User Interface
DisplaySunlight Readable Black on White Graphic LCD
Output Signals
Analogue Output2 x 0/4-20mA
Relays3 x SPCO
Sensor Ranges
SoliTechw² IR 0-200Range: 0-200 mg/l
Optical Path: 100 mm
Special Application Only
SoliTechw² IR 0-1,500Range: 0-1,500 mg/l
Optical Path: 40 mm
Wastewater Treatment - Final Settlement and Humus Tanks
Drinking Water Treatment - Clarifers
SoliTechw² IR 0-10,000Range: 0-10,000 mg/l
Optical Path: 15 mm
Wastewater Treatment - Primary Settlement Tanks
Drinking Water Treatment - Picket Fence Thickeners
SoliTechw² IR 0-30,000Range: 0-30,000 mg/l
Optical Path: 8 mm
Wastewater Treatment - Picket Fence Thickeners
Part NumberDescription
229623SludgWatch 8200w² Fixed Sludge Level Detector (85 to 264VAC, Modbus Slave, 3 x Relay Outputs)
229624SludgeWatch 8200w² Fixed Sludge Level Detector (9 to 36VDC, Modbus Slave, 3 x Relay Outputs)


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