Medição do Potencial Redox
O potencial redox quantifica a existência de oxidantes ou agentes redutores num líquido. A medição deste parâmetro é relativamente eficiente tendo em consideração o seu custo, no entanto também tem algumas desvantagens. Não determina selectivamente o tipo de oxidante ou agente redutor, depende muito do valor do pH, o sinal de medida faz uma curva de saturação com o aumento da concentração.
The Redox potential is an unspecific sum parameter that does not permit selective determination of a defined oxidant or reducing agent at simultaneous presence of further redox active reagents. Moreover, the measuring signal is strongly pH dependent and takes a saturation curve with increasing concentration. However, the Redox measurement can be used as a cost-efficient alternative to selective direct determination of oxidants and reducing agents (e.g. via amperometric probes) or as a redundant measuring additionally to selective direct determination. For this purpose, the following conditions must be observed:
- The connection to be analyzed is potential determinating and there are no further redox active connections
- The pH value of the process fluid remains constant
- The concentration to be expected is located in the steep section of the saturation curve
Application areas
- Cyanid detoxication at high pH value by oxidation
- Chromate detoxication at low pH value by reduction
- Monitoring of disinfection effect when dosing oxidants
- etc.
Our Program offers the following Advantages:
- 11 types of electrodes, partly in different versions (electric connection, installation length, cable length)
- Fittings for simple installation into bypasses, containers, pipings, a changeover fitting allows replacement without breaking the process
- Measuring transmitter with display/control for direct forward to a programmable logic controller (PLC) and without display/control
- Control devices with staged capacities
- Integration of the control circuits into Bus systems (PROFIBUS®-DP, CANopen-Bus)
- Easy calibration with buffer solutions available as accessories
- For frequently arising tasks: complete standardized measuring and metering stations as plug&play modules with optimally inter-adjusted components
