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Endress and Hauser’s Instrumentation for Aeration Control package is aimed at advanced aeration control strategies and can include instruments that measure dissolved oxygen, nitrate, ammonium, pH, suspended solids, temperature, air flow rates, air pressures and water levels in aeration basins.

The series of aeration control sensors can connect to a plant’s PLC or SCADA system using 4–20mA with HART, Profibus or other digital interfaces.

The combination of sensors and transmitters allows users to ensure that the correct amount of air is blown through a system at the right basin level, and that nutrients are removed from water efficiently.

Key product features

  • Liquiline CM442 transmitters and CAS40D sensors monitor the ammonium and nitrates of the incoming and/or treated water with a single sensor array.
  • They can also provide additional parameters such as pH, temperature, chloride and potassium.
  • The CM442’s dual-channel digital technology enables one transmitter to measure ammonium, nitrates, dissolved oxygen, temperature and pH.
  • Oxymax optical or amperometric dissolved oxygen sensors with the digital Memosens protocol monitor levels of dissolved oxygen.
  • A T-Mass 65I thermal mass insertion flowmeter can be placed in the blower air line in order to ensure the air-delivery system is working properly.
  • An Endress and Hauser Cerabar S pressure transmitter can be used to to measure air line pressure.
  • A Prosonic FMU90 ultrasonic or a Waterpilot FMX21 hydrostatic instrument are available for measuring and controlling levels.


Endress+Hauser is a global leader in measurement instrumentation, services and solutions for industrial process engineering. With over 8,000 employees worldwide, the Group generates annual net sales of more than Euro1.1 billion.

The Endress+Hauser Group

Endress+Hauser is a global leader in measurement instrumentation, services and solutions for industrial process engineering. The Group employs 13,000 personnel across the globe, generating net sales of more than 2.1 billion euros in 2015.
With dedicated sales centres and a strong network of partners, Endress+Hauser guarantees competent worldwide support. Production centers in 11 countries meet customers’ needs and requirements quickly and effectively. The Group is managed and coordinated by a holding company in Reinach, Switzerland, with UK headquarters in Manchester. As a successful family-owned business, Endress+Hauser is set for continued independence and self-reliance.
Endress+Hauser provides sensors, instruments, systems and services for level, flow, pressure and temperature measurement as well as analytics and data acquisition. The company supports customers with automation engineering, logistics and IT services and solutions. Our products set standards in quality and technology.
We work closely with the chemical, petrochemical, food & beverage, oil & gas, water & wastewater, power & energy, life science, primaries & metal, renewable energies, pulp & paper and shipbuilding industries. Endress+Hauser supports its customers in optimising their processes in terms of reliability, safety, economic efficiency and environmental impact.
Founded in 1953 by Georg H Endress and Ludwig Hauser, Endress+Hauser has been solely owned by the Endress family since 1975. The Group has developed from a specialist in level measurement to a provider of complete solutions for industrial measuring technology and automation, with constant expansion into new territories and markets.

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