The original DiST (Dissolved Solids Tester) was first introduced in 1986 by Hanna™. Since then, Conductivity and Total Dissolved Solids measurements have never been easier. DiST's ease-of-use, in combination with its affordability, made it the standard in EC and TDS measurement. Hanna™ continues the tradition of innovation with the DiST 5 and DiST 6. Here at Hanna™ we have always valued the comments and suggestions coming from our customers. For this series, we have included all the Features you have asked for and more! The DiST 5 and DiST 6 include Features such as a replaceable graphite electrode, adjustable TDS ratio, temperature in °C or °F, automatic temperature compensation (ATC) with adjustable ¯, battery level indicator, stability indicator, automatic shut-off and automatic calibrating all in a floating, waterproof casing. This 3-in-1 tester is unmatched in EC/TDS/Temperature measurements!