WaterTechw² Redox8000 Redox and Temperature Sensor

Measurement of Redox or ORP is useful in many water, wastewater and industrial water processes, for example the control of disinfection processes such as chlorination in cooling towers. The electrode design is very similar to the equivalent pH electrode (WaterTechw² pH8000), the difference being that the pH glass is replaced with a Platinum band. The measurement of the oxidation-reduction potential (Redox or ORP) of an aqueous solution is a broad, non-specific indicator of the chemical activity of the solution. In drinking water processes Redox measurement is a highly effective tool for controlling chlorine and ozone treatment, it provides an excellent indicator of the ability of the disinfectant to remove contaminants from the water.

In wastewater processes Redox measurement has the ability to provide an indication of the condition of the anoxic and anaerobic zones within an activated sludge (ASP) plant's aeration tanks, this is beyond what is possible with the far more commonly used Dissolved Oxygen measurements. The measurement can also be used as an indicator of the load entering a processing plant, giving an early warning of potential control problems.

When used in dip format the WaterTechw² Redox8000 sensor can be supplied with a shaft assembly and accompanying handrail/wall brackets. These parts have been designed to be suit the majority of installations, alternatives and bespoke solutions can be supplied if necessary. Shaft lengths up to 3 metres are offered as standard with longer lengths being catered for when required subject to safety and shipping considerations. For installation in applications where gross 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.

Our flowcell assemblies are intended for applications where it is not possible to gain direct access to the sample using a dip sensor, these are typically applications in drinking water and final effluent discharge. The flowcell has been designed to take a small positive pressure (1Bar) however the outlet from the unit is normally fed to drain. Multiparameter Options The WaterWatch² platform has been designed to accommodate multiple sensors and multiple parameters in the same 7300w² Monitor. Versions of this flowcell are available to combine pH measurement with Turbidity, Redox and DO. These combinations provide an extremely cost effective way of monitoring for regulatory or control purposes.

Applications

• Activated Sludge Control
  

• Intake Protection
  

• Disinfectation Control
  

Industries

• Drinking Water
  

• Wastewater Treatment
  

• Industrial Effluent
  

Physical - Dip

Physical - Flowcell

Redox Measurement

Temperature Measurement

Environmental Data

Interface to Monitor