Sludge Blanket Sensors

Soli-Tech 20v2 and IR Sensors

Partech offer a selection of sensors that for use in conjunction with our range of Sludge Blanket monitoring instruments. All the sensors use infrared attenuation as their operating principle, this makes them sufficiently sensitive for use on thin water treatment sludges as well as the more usual sewage treatment applications. When monitoring the Sludge Blanket Level in settlement tanks it is important to ensure that the sensor is sensitive enough to detect low density solids before 'carry-over' to the next process stage occurs, ensuring that potential pollution events are highlighted before they occur. At the same time the sensor should not be 'blinded' by solids in the supernatant. Advice on sensor selection is included in the brochure and our engineers are available to provide further advice if required.

Soli-Tech 20v2 Sensors: available in 3 ranges, these sensors benefit from a machined housing and offer excellent resistance to temperature and chemical attack.

Infrared Sensors: available in 4 ranges, these sensors are preferred when fouling of the sensor 'gap' is an issue and are easier to clean. The sensors shown are supplied with the 8100 and 8200 Monitors to provide an alarm for high sludge blanket level and with the ASLD 2200 to provide a continuous output signal.

Applications

  • Final Settlement Tanks
  • Clarifiers
  • Primary Settlement Tanks

Features

  • Low Purchase Cost
  • Simple Operation
  • Large Sample Volume

Technical Specification

Physical

WeightInfrared Sensors: 0.35 kg
Soli-Tech2 20v2 Sensors: 0.7 kg
Dimensions (hxwxd)IR100 Sensors: 95 x 160 x 25 mm
IR40 Sensors: 95 x 100 x 25 mm
IR15/8 Sensors: 95 x 75 x 25 mm
Soli-Tech 20v2 Sensors: 247 x 73 x 30 mm
Enclosure RatingIP68
Material of ConstructionInfrared Sensors: Epoxy Resin Moulded Body
Soli-Tech 20v2 Sensors: Black Acetal Co-Polymer
Cable EntriesIntegral Cable Gland
Cable Type3 core, 5mm O/D, Polyurethane Coated
Cable Length10 metres standard, 100 metres maximum

Environmental Data

Operating Temperature 0 - 50ºC
Storage Temperature -20 to 60ºC
Location Indoor or Outdoor
Pressure Rating10 mWC

Interface to Monitor

Sensor OutputPulse Width Modulation
Power12 VDC from Monitor

Measurement Principal

Principal of OperationLight Attentuation
Wavelength960 nm Infrared

Measurement Characteristics

Accuracy+/- 10 mm
Accuracy will depend on the settling characteristics of the solids and can vary during operation of the plant
FlowrateNot affected by flowrate

Sensor Selection

IR100 SensorSpecial Applications Only
IR40 SensorWTW Clarifier, STW Final Settlement
IR15 SensorWTW Thickener, STW Primary Settlement
IR8 SensorSTW Thickener
Soli Tech 20v2 Sensor 0-200Special Applications Only
Soli Tech 20v2 Sensor 0-1,500WTW Clarifier, STW Final Settlement
Soli Tech 20v2 Sensor 0-10,000WTW Thickener, STW Primary Settlement
Soli Tech 20v2 Sensor 0-30,000STW Thickener
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