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.
| 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 |