ENDRESS+HAUSER  CA80AM-AAA11C101

Integrated controller with up to 2 measuring channels and digital Memosens technology

Application

• Digital fieldbuses (Modbus TCP or Modbus RS485) and integrated web server
• Monitoring and optimization of the cleaning capacity of municipal and industrial wastewater treatment plants
• Monitoring of the wastewater treatment plant outlet for documentation purposes
• Monitoring and optimization of activated sludge basins

Your benefits

• Easy upgrade to measuring station by connecting with up to four Memosens sensors
• Automatic calibration and cleaning
• User-configurable measuring, cleaning and calibration intervals
• Optional cooling module for longer reagent life time
• Low maintenance costs thanks to long reagent life
• User-definable measuring ranges
• Modular design for easily extensible functionality
• Digital communication for remote access
• Two-channel device available

Colorimetric measuring principle

After application-specific sample preparation, some of the permeate is pumped into the mixing/ reaction chamber. The specific color reagent is metered exactly in a defined mixture ratio. The chemical reaction causes the characteristic change in the color of the sample. The multispectral photometer measures the level of absorption by the sample or the stain solution at defined wavelengths. The analyzed wavelengths, and their relationships to one another, are parameter- specific.

Based on proportionality the amount of light absorption is a direct indicator of the concentration of the parameter under analysis in the sample. To compensate for any interference influences resulting from turbidity and fouling, as well as from the deterioration and aging of the LEDs, a reference measurement is performed before the actual measurement. This reference signal is subtracted from the measuring signal. The temperature in the photometer is kept constant to ensure a reproducible reaction that takes place with a short period of time.