COS61

When the sensor is immersed in the process medium, an oxygen partial pressure equilibrium is quickly established between the medium and the fluorescent layer. The sensor’s optical system emits a colored light pulse toward the fluorescent layer, which responds by emitting a red light pulse. The duration and intensity of the response signal are directly related to the oxygen concentration and oxygen partial pressure. In an oxygen-free medium, the response signal has a longer duration and higher intensity. Oxygen molecules quench the fluorescence of the indicator molecules, resulting in a shorter response time and lower signal intensity. The sensor’s response signal is correlated with the dissolved oxygen concentration in the process medium. Atmospheric pressure can either be set as a fixed value or supplied by another sensor. The sensor also continuously records the process medium temperature internally, and both atmospheric pressure and temperature are taken into account when calculating the dissolved oxygen concentration.

Standard

The Oxymax COS61 is a high-performance dissolved oxygen sensor that provides fast, accurate, and drift-free measurement. It features low maintenance requirements, broad application versatility, and easy operation. Its long-term stable, oxygen-selective fluorescent layer ensures reliable measurement without interference. The Oxymax COS61 is designed for dissolved oxygen measurement in: • Wastewater treatment plants • Drinking water treatment plants • Utility applications • Fish ponds