5V LR44 button cell batteries included

Durable Construction: Stainless steel body withstands harsh testing environments and frequent use

and 10 buffers for maximum accuracy

Upgraded to 4 filters

and other pH meters requiring pH 4

Milwaukee CD611 Digital Conductivity Pen - EC Meter for Water Quality Testing made in Canada 5V LR44 button cell batteriesMilwaukee CD611 Digital Conductivity Pen Precision EC Measurement The Milwaukee CD611 Digital Conductivity Pen is a compact, portable EC (electrical conductivity) meter designed for fast, accurate water quality testing in hydroponics, pool maintenance, aquariums, food & beverage production, and water treatment applications. This handheld pen combines lab grade accuracy with field ready convenience, making it ideal for professionals and enthusiasts who