Dissolved oxygen sensors

Sensors for measuring optical oxygen are available with two measuring principles:

• Optical sensors (Luminescence)
• Amperometric or Polarographic sensors 

Optical sensors have made great advances in recent years. They are therefore easier to use and require much less maintenance - no electrolyte, no membrane, no polarisation time - than classical amperometric sensors. 

Optical sensors

Depending on the application, there are various optical oxygen sensors based on “luminescence quenching”. Typical applications include fermentation, food, brewing and soft drinks, biotechnology and pharmaceuticals, water treatment, boiler (feed) water and other industrial applications. Ask our specialists to help you choose the most suitable version. 

The sensors are digital and operate with the ISM protocol (Intelligent Sensor Management). This means that you not only have a pre-calibrated sensor, but you can also easily calibrate and perform diagnostics with reporting via PC. You can be sure of the quality of your measurement at any time. 

There are also versions available that directly transmit an mA signal, which means that no additional transmitter is required. Other types communicate digitally via Modbus. 

Amperometric sensors 

The classical oxygen sensor based on the well-known Clark principle. These sensors are also digital and intelligent (ISM). There are two main types, depending on the measuring range and application (0mg/l to saturation and the extremely low µg/l or ppb level). The application areas are the same as for the optical sensors.