This digital oxygen meter from Lutron is used for determining dissolved oxygen content in waste water, in biotechnological fermentation, aquarium water, air etc. Application of this instrument can be noticed in fish hatchery, agricultural arena, medical research and also in other fields. To maintain high measurement accuracy, this instrument is designed with polarographic oxygen probe and temperature sensor. Microprocessor based circuit design of this instrument helps it to achieve high precision in every aspect of its measurement process. This Oxygen Meter uses RS 232 serial interface which is easy to comprehend. Long working life, uninterrupted functioning and minimal failure rate are the key aspects of this Lutron product.