OxyTechw² GAL Dissolved Oxygen Sensor

Galvanic Sensor for Dissolved Oxygen Monitoring

The OxyTechw² GAL Sensor has been designed to provide highly reliable Dissolved Oxygen measurements the sensor employs the traditional galvanic principle. The rugged 100 micron, HDPE membrane has been selected to provide exceptional resistance to damage. This, combined with Oxyguard's unique electrolyte and anode material provides long term stability of 3 years and longer without the need for sensor refurbishment or membrane replacement.

For installation in activated sludge plants (ASP's) we recommend that the sensor is installed using our specially designed mounting system, with a flexible joint in the mounting shaft. The flexible joint moves the sensor in the process, keeping the membrane clean by reducing bio-fouling without the use of a compressor and with the added benefit of allowing rags to fall away from the assembly. This motion is similar to that achieved by using a floating ball assembly, with the added advantage of placing the sensor below the surface of the liquor. This means that the sensor is below the level of the floating fats and greases that accumulate at the surface and results in the Dissolved Oxygen reading being more representative of the whole tank.

The OxyTechw² GAL provides the reliable, accurate measurement that is required to operate activated sludge plants at the optimum Dissolved Oxygen concentration, maintaining the balance between the running costs of blowers and aerators and the need to produce high quality effluent.

Applications

  • Activated Sludge Control
  • River Quality Monitoring
  • Aquaculture

Features

  • No routine membrane replacement
  • Long Service Interval
  • Minimal Maintenance

Technical Specification

Physical

Dimensions58 mm diameter x 88 mm long
Weight0.5 kg
Protection ClassIP68
Material of ConstructionPolyoxymethylene (POM)
Cable EntriesIntegral Cable Gland
Cable Type4 core, Polyurethane Coated
Cable Length10 metres standard, 100 metres maximum
Service RequirementNo routine service
Periodic cleaning and calibration are required at a frequency determined by the application

Environmental Data

Operating Temperature 0 - 50ºC
Storage Temperature -10 to 60ºC
Pressure Rating5 Bar
Location Indoor

Interface to Monitor

Sensor OutputModTechw², RS485
Power12 VDC from Monitor

Measurement Principal

Principal of OperationGalvanic Oxygen Partial Pressure Cell, Self Polarizing, Self Temperature Compensating
Iron /Silver Electrode Combination
Temperature MeasurementsNTC

Measurement Characteristics

Accuracy+/- 0.1 mg/l or +/- 1% SAT
RepeatabilityBetter than +/- 1% FSD on real sample
Response Time90% of step change in less than 90 seconds
Flowrate1 cm/second
Range0-20.00 mg/l or ppm
0-200 %SAT
Information to Download
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