YSI EcoSense EC300M [601034] Conductivity, Salinity, TDS, Temperature (Cable/sensor sold separately). The YSI EcoSense EC300M conductivity and temperature meter provides the most accurate data in the most affordable format. The instruments feature an easy-to-use interface, one-hand operation, IP67 waterproof case, and low cost of ownership over the life of the product. 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. The EC300M is designed for quick, accurate results in an economical platform. The ability to measure conductivity, salinity, TDS and temperature in a simple, compact handheld allows the instrument to be used across multiple application sampling strategies. With a one-year instrument and electrode warranty, waterproof case and ease-of-use, the EC300M will fit your needs.