Partech - Model Sludgewatch 715 -Sludge Blanket Detector

This method of sludge blanket detection offer major improvements over traditional SludgeJudge type systems in terms of both repeatability and importantly health and safety – no more manhandling 4 metre tubes full of contaminated wastewater.

Reliable detection of the sludge interface is necessary to allow operators to de-sludge tanks at the right time. Emptying the tank too often is inefficient in terms of manpower and can have knock on effects on the operation of other parts of the sludge treatment system. Equally allowing the tank to have too much sludge can cause carry over to the next process stage or into the local watercourse. Neither scenario is desirable, and the 715 will provide a quick and easy check on the interface position without relying on operator judgement.

The SludgeWatch 715 uses a range of infrared sensors to make the sludge interface detection. Infrared attenuation has been selected as it is ideally suited to detecting the sludge present in the interface zone. This tends to be considerably ‘thinner’ than the sludge that is present at the bottom of a settlement tank.

• Water Treatment
• Water Treatment Clarifiers
• Sewage Treatment Final Settlement
• Humus Tanks
• Water Treatment Sludge Thickeners
• Sewage Treatment Primary Tanks
• Sewage Treatment Thickeners

Measurement Characteristics

• Principal of Operation : Light Attenuation
• Wavelength : 960 nm Infrared
• Accuracy : +/- 1 cm of interface
• Resolution : Standard cable markings every 1.0 metres
• Units of Measurement : metres
• Response Time : 0.5 seconds

Sensor Selection :

• IR100 :
• Range: 0-200 mg/l
• Optical Path: 100 mm
• Special Application Only
• IR40 :
• Range: 0-1,500 mg/l
• Optical Path: 40 mm
• Wastewater Treatment - Final Settlement and Humus Tanks
• Drinking Water Treatment - Clarifers
• IR15 :
• Range: 0-10,000 mg/l
• Optical Path: 15 mm
• Wastewater Treatment - Primary Settlement Tanks
• Drinking Water Treatment - Picket Fence Thickeners
• IR8 :
• Range: 0-30,000 mg/l
• Optical Path: 8 mm
• Wastewater Treatment - Picket Fence Thickeners

Physical

• Dimensions (hxwxd) : 280 x 230 x 130 mm
• Weight : 1.7 kg including sensor and 10 metres of cable
• Protection Class : Electronics: IP54
• Sensor: IP68
• Enclosure Material : Dark Blue Nylon
• Cable Length : 10 metres standard, 15 metres maximum

Electrical :

• Power Supply : 9V Battery (PP3)
• Battery Life : 6 months typical use

Environmental Data :

• Operating Temperature : 0 to 40ºC, limited by the risk of ice formation interfering with the measurement
• Storage Temperature : -20 to 60ºC
• Location : Indoor/Outdoor

User Interface :

• Display : Front Panel LED - `ON` in Sludge
• Audible Output : Short Tone in Water, Long Tone in Sludge