The YSI EcoSense ODO200M dissolved oxygen meter is designed for quick, accurate results in an economical platform. The ability to measure DO optically along with temperature, in a simple, compact handheld allows the instrument to be used across multiple application sampling strategies in the field. With a one-year instrument, probe and sensor cap warranty, IP67 waterproof case and ease-of-use, the EcoSense ODO200M will fit your needs. Additionally, this unit features a micro-USB port for transferring data to a PC (no software required) and a memory that can hold up to 250 data sets.