WaterTechw² pH, Redox and Temperature Sensor

Combined Sensor for pH, Redox and Temperature Monitoring

The WaterTechw² PHEVT Sensor has been designed to provide highly reliable pH, Redox and Temperature measurements. The electrode uses Ponsel's Plastogel technology, the long life reference increases the life of the electrode, reducing maintenance and operating costs.

The electrode has been designed to work in even the most difficult applications, from pure mountain streams with conductivity as low as 20 µS/cm, through lakes and rivers, seawater and wastewater with conductivity of 200 mS/cm. By having such a flexible sensor users can adopt the WaterTechw² PHEVT as the standard sensor for water quality monitoring.

For installation in applications where fouling is anticipated 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, reducing bio-fouling and 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 liquid. In applications where fouling is not expected or where there is insufficient space alternative mounting arrangements are available.

Applications

  • Activated Sludge Control
  • River Quality Monitoring
  • Effluent Monitoring

Features

  • Combined pH and Redox
  • Long Service Interval
  • Minimal Maintenance

Technical Specification

Physical

Dimensions27 mm diameter x 207.5 mm long
Weight0.35 kg
Protection ClassIP68
Material of ConstructionPVC Body, pH Glass, Platinum
Cable EntriesIntegral Cable Gland
Cable Type6 core, Polyurethane Coated
Cable Length10 metres standard, 100 metres maximum
Service RequirementElectrode Cartridge Replacement
Periodic Cleaning and calibration are required at a frequency determined by the application

Environmental Data

Operating Temperature 0 - 60ºC
Storage Temperature 0 to 60ºC
Pressure 5 Bar
Location Indoor/Outdoor

Interface to Monitor

Sensor OutputModTechw², RS485
Power12 VDC from Monitor

pH Measurement

Principal of OperationCombined Electode (pH/reference) - Ag/AgCl
Reference Gel Electrolyte - KCl
Accuracy+/- 0.05 pH
Resolution0.01 pH
Range0 - 14 pH

Redox Measurement

Principal of Operation Combined Electrode (Redox/Refrerence), Platinum Tip, Ag/Ag/Cl
Reference Gel Electrolyte (KCl)
Accuracy+/- 2 mV
Resolution0.1 mV
Range-1,000 - 1,000 mV

Temperature Measurement

Temperature MeasurementsNTC
Accuracy+/- 0.5ºC
Resolution0.01ºC
Range0- 50º C
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