Home > Sludge Blanket Measurement > Portable Sludge Blanket Level Detector
The SludgeWatch 715 Portable Sludge Blanket Level Detector 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.
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.
| OPERATING TEMP. | 0 to 50°C (32 to 140°F), limited by risk of ice formation interfering with measurement | BATTERY LIFE | 6 months typical use |
| DIMENSIONS | 280 mm (11”) x 230 mm (9”) x 130 mm (5.1”) (H x W x D) | DISPLAY | Front Panel LED – ‘ON‘ in Sludge |
| WEIGHT | 1.7 kg ( 3.74lbs) | ACCURACY | ± 1 cm (0.3″) of interface |
| PROTECTION CLASS | Electronics: IP54 Sensor: IP68 | PRINCIPAL OF OPERATION | Light Attenuation |
| ENCLOSURE MATERIAL | Dark Blue Nylon | WAVELENGTH | 960nm Infrared |
| AUDIBLE OUTPUT | Short Tone in Water Long Tone in Sludge | RESOLUTION | Standard Cable markings every 1.0 metres or every 1 foot |
| POWER SUPPLY | 9V Battery (PP3) | RESPONSE TIME | 0.5 seconds |
| STANDARD SENSORS | DIMENSIONS | WEIGHT | OPTICAL PATH | RANGE | CABLE LENGTH | SERVICE REQUIREMENT |
| IR8 Sensor | 95 (3.7”) x 8 (0.3”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 8mm | 0 – 30,000 | 10 metres (32.8 ft) standard | No routine servicing |
| IR15 Sensor | 95 (3.7”) x 15 (0.6”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 15mm | 0 – 10,000 | 10 metres (32.8 ft) standard | No routine servicing |
| IR40 Sensor | 95 (3.7”) x 40 (1.6”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 40mm | 0 – 1,500 | 10 metres (32.8 ft) standard | No routine servicing |
| IR100 Sensor | 95 (3.7”) x 100 (3.9”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 100mm | 0 – 200 | 10 metres (32.8 ft) standard | No routine servicing |
| SENSOR | SETPOINT (NOT USER ADJUSTABLE) | TYPICAL APPLICATIONS |
| IR100 – Range 0 to 200mg/l The sensor should only be used if the sludge is very ‘light’ with very clear supernatant. | Setpoint very approximately – 100 mg/l | Water Treatment |
| IR40 – Range 0 to 1,500mg/l This is the most commonly used sensor and is suitable for use on final settlement tanks in sewage treatment applications and clarifiers in water treatment works. | Setpoint very approximately – 750 mg/l | Water Treatment Clarifiers Sewage Treatment Final Settlement Humus Tanks |
| IR15 – Range 0 to10,000mg/l This sensor is also regularly used for sludge blanket detection and is normally used for primary settlement in sewage treatment and sludge thickeners in water treatment. | Setpoint very approximately – 5,000 mg/l | Water Treatment Sludge Thickeners Sewage Treatment Primary Tanks |
| IR8 – Range 0 to 30,000mg/l This sensor should be applied on sludge thickeners in sewage treatment plants. | Setpoint very approximately – 15,000 mg/l | Sewage Treatment Thickeners |
| Note: Sensor ranges and detection points are appoximate and depend on the site-specific nature of the treatment process. | ||
The SludgeWatch 715 Portable Sludge Blanket Level Detector 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.
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.
| OPERATING TEMP. | 0 to 50°C (32 to 140°F), limited by risk of ice formation interfering with measurement | BATTERY LIFE | 6 months typical use |
| DIMENSIONS | 280 mm (11”) x 230 mm (9”) x 130 mm (5.1”) (H x W x D) | DISPLAY | Front Panel LED – ‘ON‘ in Sludge |
| WEIGHT | 1.7 kg ( 3.74lbs) | ACCURACY | ± 1 cm (0.3″) of interface |
| PROTECTION CLASS | Electronics: IP54 Sensor: IP68 | PRINCIPAL OF OPERATION | Light Attenuation |
| ENCLOSURE MATERIAL | Dark Blue Nylon | WAVELENGTH | 960nm Infrared |
| AUDIBLE OUTPUT | Short Tone in Water Long Tone in Sludge | RESOLUTION | Standard Cable markings every 1.0 metres or every 1 foot |
| POWER SUPPLY | 9V Battery (PP3) | RESPONSE TIME | 0.5 seconds |
| STANDARD SENSORS | DIMENSIONS | WEIGHT | OPTICAL PATH | RANGE | CABLE LENGTH | SERVICE REQUIREMENT |
| IR8 Sensor | 95 (3.7”) x 8 (0.3”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 8mm | 0 – 30,000 | 10 metres (32.8 ft) standard | No routine servicing |
| IR15 Sensor | 95 (3.7”) x 15 (0.6”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 15mm | 0 – 10,000 | 10 metres (32.8 ft) standard | No routine servicing |
| IR40 Sensor | 95 (3.7”) x 40 (1.6”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 40mm | 0 – 1,500 | 10 metres (32.8 ft) standard | No routine servicing |
| IR100 Sensor | 95 (3.7”) x 100 (3.9”) x 25 (0.9”) mm | 0.7 kg (1.54 lbs) inc 10m of cable | 100mm | 0 – 200 | 10 metres (32.8 ft) standard | No routine servicing |
| SENSOR | SETPOINT (NOT USER ADJUSTABLE) | TYPICAL APPLICATIONS |
| IR100 – Range 0 to 200mg/l The sensor should only be used if the sludge is very ‘light’ with very clear supernatant. | Setpoint very approximately – 100 mg/l | Water Treatment |
| IR40 – Range 0 to 1,500mg/l This is the most commonly used sensor and is suitable for use on final settlement tanks in sewage treatment applications and clarifiers in water treatment works. | Setpoint very approximately – 750 mg/l | Water Treatment Clarifiers Sewage Treatment Final Settlement Humus Tanks |
| IR15 – Range 0 to10,000mg/l This sensor is also regularly used for sludge blanket detection and is normally used for primary settlement in sewage treatment and sludge thickeners in water treatment. | Setpoint very approximately – 5,000 mg/l | Water Treatment Sludge Thickeners Sewage Treatment Primary Tanks |
| IR8 – Range 0 to 30,000mg/l This sensor should be applied on sludge thickeners in sewage treatment plants. | Setpoint very approximately – 15,000 mg/l | Sewage Treatment Thickeners |
| Note: Sensor ranges and detection points are appoximate and depend on the site-specific nature of the treatment process. | ||
WJF Instrumentation Ltd.
#5 3610 – 29th Street N.E.
Calgary, Alberta
Canada
T1Y 5Z7
Calgary Head Office
Toll-Free: (877) 291-5572
Standard: (403) 291-5570
Ontario & Maritimes Sales:
Toll-Free (877) 291-5572
