Process Control Instruments, Field Devices and Industrial Automation
SKU# (339)

ENDRESS+HAUSER  CAS40D-AA1A1A1




ENDRESS+HAUSER CAS40D-AA1A1A1 (1)
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EH ISEmax CAS40D digital memosens Ion-sensitive sensor for continuous measurement of ammonium and nitrate in the wastewater industry. Self-cleaning functionality. Temperature sensor.

Part# with Options:        CAS40D-AA1A1A1
Price with Options:        Please Email us your request for quote   

Options:    

ISE slot 1
(1) ISE slot 1 for EH CAS40D
Adaption Cable
(2) Adaption Cable for EH CAS40D
Cable Length
(3) Cable Length for EH CAS40D

  Availability 10 Days  ]

Online measurement of nutrient parameters in municipal wastewater treatment plants

Ion-sensitive sensor for continuous measurement of ammonium, nitrate and other ions

Application

The ion-sensitive sensor works directly in the activated sludge basin of municipal sewage treatment plants without any additional sample conditioning or sample transportation.

A complete measuring system consists of a sensor with electrodes and a transmitter with display and operating elements.

The sensor is used to monitor the ammonium and nitrate content

  • in the activated sludge basin
  • in the preclarification outlet.
Your benefits
  • Reliable, cost-saving unit:
    • Direct measurement of ammonium or nitrate without costly sample conditioning
    • Optional potassium and/or chloride measurement, also to compensate high concentrations of interference ions
    • pH measurement as standard
    • Low operating costs since no reagent used
  • Versatile and flexible: Large measuring range 0.1-1000 mg/l NH4-N or 0.1-1000 mg/l NO3-N
  • Easy-to-use and safe:
    • Installed directly on the basin rim, no measuring container or sample-conveying pump required
    • Minimum maintenance thanks to compressed air cleaning
    • Long electrode service life, membrane cap must be replaced every 6 months approximately
    • Standardized digital communication enables Plug & Play
Measuring principle

At the heart of the ion-selective electrode (ISE) is a membrane that is selective for the ion to be measured. An ionophore is integrated into the membrane which facilitates the selective "migration" of a specific type of ion (e.g. ammonium or nitrate) to the electrode. As a result of ion migration, a change in the charge occurs, causing the creation of a potential that is proportional to the ion concentration logarithm. The potential is measured against a reference electrode with a constant potential and converted to a concentration using the Nernst equation. With the potentiometric measuring principle, the color and turbidity do not affect the measurement result.

Measuring Principle Potentiometric / ISE
Characteristic Online measurement of nutrient parameters Ion-selective electrode system for the continuous measurement of ammonium and nitrate
Size diameter 75mm , (2.95inch)
immersion depth 510mm , (20,1 inch)
Design Ion-selective electrode(s) for ammonium and/or nitrate, potassium or chloride
pH - (Reference) electrode
Ion-selective electrode for compensating cross-interference
Temperature sensor
Process temperature 2C ... 40C
(36 ...100F)
Ambient temperature -20C ... 50C
(-4...120F)
Process pressure 400 mbar (160 inH2O) max. permitted overpressure
Application waste water
Measurement range Ammonium: 0.1 to 1000 mg/l (NH4-N)
Nitrate: 0,1 to 1000 mg/l (NO3-N)
Potassium: 1 to 1000 mg/l
Chloride: 1 to 1000 mg/l

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