Sludge Blanket Detection Made Easy
The SludgeWatch 715 provides a simple, low cost method of spot checking the sludge blanket level in a wide variety of settlement tanks. The cable reel design removes
the need for any additional carrying bag.
The sludge blanket is detected by winding the sensor down into the tank, the audible tone will change and the LED illuminates once the sensor has reached the blanket.
The markings on the sensor cable are then used to determine the depth of the blanket. Additional markings can be added to the cable to pre-define maximum and minimum
sludge blanket positions.
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.
- Self Contained Cable Reel
|Dimensions||280 x 230 x 130 mm (HxWxD)|
|Protection Class||Electronics IP54, Sensor IP68|
|Enclosure Material||Dark Blue Nylon|
|Cable Entries||via Integral Grommet|
|Cable Size||5 mm OD|
|Cable Length||10 metres standard ,15 metres maximum|
|Operating Temperature ||Electronics -20 to 50ºC, Sensor 0-40ºC |
|Storage Temperature ||Electronics -20 to 60ºC, Sensor 0-40ºC |
|Display||Front Panel LED, 'ON' in Sludge|
|Audible Output||Short Tone in Water, Long Tone in Sludge|
|Units of Measurement||metres|
|Power Supply||9VDC PP3 Alkaline Battery |
|Battery Life ||3-6 months typical use |
|Accuracy||+/- 1 cm of interface|
|Resolution||Standard cable marking every 1.0 metres|
|Measurement Principle||Light Absorption|
|Response Time||0.5 seconds|
|IR100 Sensor||Special Applications Only|
|IR40 Sensor||WTW Clarifier, STW Final Settlement|
|IR15 Sensor||WTW Thickener, STW Primary Settlement|
|IR8 Sensor||STW Thickener|
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