This breakthrough technology the monitoring dissolved oxygen suppliesoffers many advantages in wastewater treatment plants. Monitor in a, with an accuracy of 0.1 ppm. Temperature and pressure in built and a fast time gives quicker readings. Based on light emitting technology, tthis do system is way ahead of the conventional electrochemistry based monitoring. Monitor in a, with an accuracy is 0.1 ppm. Temperature and pressure compensation are in built and a fast response time gives quicker readings.